BQ dataset used in dataflow example doesn't exist

The `python-dataflow-example.example_data` BigQuery dataset used in the cookbook batch-examples of dataflow-examples code is returning a 404 and all operations with code that references it are failing.

Did this dataset change in some way recently?

Link to two files where I know dataset is referenced:
https://github.com/GoogleCloudPlatform/professional-services/blob/master/examples/dataflow-python-examples/batch-examples/cookbook-examples/pipelines/data_enrichment.py
https://github.com/GoogleCloudPlatform/professional-services/blob/master/examples/dataflow-python-examples/batch-examples/cookbook-examples/pipelines/data_lake_to_mart.py

Start with the referenced pipelines/data_enrichment.py and pipelines/data_lake_to_mart.py files, then inspect how they reference the python-dataflow-example.example_data BigQuery dataset. Verify the 404 and determine whether the examples need a valid replacement or updated reference; done means the affected operations run successfully against an available dataset.

Written by the indexing model from the issue text.