Error: relation extraction in the chemprot dataset in Pytorch

Traceback (most recent call last):
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/common/util.py", line 289, in get_spacy_model
spacy_model = spacy.load(spacy_model_name, disable=disable)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/spacy/__init__.py", line 27, in load
return util.load_model(name, **overrides)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/spacy/util.py", line 139, in load_model
raise IOError(Errors.E050.format(name=name))
OSError: [E050] Can't find model 'en_core_web_sm'. It doesn't seem to be a shortcut link, a Python package or a valid path to a data directory.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connection.py", line 160, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/util/connection.py", line 84, in create_connection
raise err
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/util/connection.py", line 74, in create_connection
sock.connect(sa)
ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connectionpool.py", line 677, in urlopen
chunked=chunked,
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connectionpool.py", line 381, in _make_request
self._validate_conn(conn)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connectionpool.py", line 976, in _validate_conn
conn.connect()
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connection.py", line 308, in connect
conn = self._new_conn()
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connection.py", line 172, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: : Failed to establish a new connection: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/connectionpool.py", line 725, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/urllib3/util/retry.py", line 439, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /explosion/spacy-models/master/shortcuts-v2.json (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/run.py", line 21, in
run()
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/run.py", line 18, in run
main(prog="allennlp")
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/commands/__init__.py", line 102, in main
args.func(args)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/commands/train.py", line 124, in train_model_from_args
args.cache_prefix)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/commands/train.py", line 168, in train_model_from_file
cache_directory, cache_prefix)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/commands/train.py", line 226, in train_model
cache_prefix)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/training/trainer_pieces.py", line 41, in from_params
all_datasets = training_util.datasets_from_params(params, cache_directory, cache_prefix)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/training/util.py", line 165, in datasets_from_params
dataset_reader = DatasetReader.from_params(dataset_reader_params)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/common/from_params.py", line 365, in from_params
return subclass.from_params(params=params, **extras)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/common/from_params.py", line 388, in from_params
return cls(**kwargs) # type: ignore
File "/home/hui2019/scibert-master/scibert-master/scibert/dataset_readers/classification_dataset_reader.py", line 33, in __init__
self._tokenizer = tokenizer or WordTokenizer()
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/data/tokenizers/word_tokenizer.py", line 44, in __init__
self._word_splitter = word_splitter or SpacyWordSplitter()
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/data/tokenizers/word_splitter.py", line 173, in __init__
self.spacy = get_spacy_model(language, pos_tags, parse, ner)
File "/home/hui2019/scibert-master/scibert-master/src/allennlp/allennlp/common/util.py", line 292, in get_spacy_model
spacy_download(spacy_model_name)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/spacy/cli/download.py", line 38, in download
shortcuts = get_json(about.__shortcuts__, "available shortcuts")
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/spacy/cli/download.py", line 84, in get_json
r = requests.get(url)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/sessions.py", line 530, in request
resp = self.send(prep, **send_kwargs)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/sessions.py", line 643, in send
r = adapter.send(request, **kwargs)
File "/home/hui2019/anaconda3/envs/py36_pytorch1.3.1/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='raw.githubusercontent.com', port=443): Max retries exceeded with url: /explosion/spacy-models/master/shortcuts-v2.json (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',))

I hope you help me, thanks.