https://cloud.google.com/blog/ja/products/data-analytics/ml-inference-in-dataflow-pipelines
$ pipenv --python 3.8
$ pipenv shell
$ pip install apache_beam==2.25.0 tensorflow==2.3.1 tensorflow_text==2.3.0 t5==0.7.1
karahiyo/colab_t5_ml
https://cloud.google.com/blog/ja/products/data-analytics/ml-inference-in-dataflow-pipelines