horovod_deployment_notebook.ipynb failed CI

Link to the notebook:
https://github.com/aws/amazon-sagemaker-examples/blob/master/sagemaker-python-sdk/mxnet_horovod_maskrcnn/horovod_deployment_notebook.ipynb

Error:

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Exception encountered at "In [3]":
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NameError Traceback (most recent call last)
in
1 #We will use GluonCV's tool to download our data
----> 2 gcv.utils.download('https://gluon-cv.mxnet.io/_downloads/b6ade342998e03f5eaa0f129ad5eee80/mscoco.py',path='./')

NameError: name 'gcv' is not defined

Open sagemaker-python-sdk/mxnet_horovod_maskrcnn/horovod_deployment_notebook.ipynb and inspect the setup and import cells before In [3]. Run the notebook or its CI check to reproduce the undefined gcv error; done means the notebook completes that step without the reported NameError.

Written by the indexing model from the issue text.