Not sure why you're being downvoted. I also cannot get to at least one dataset -https://storage.googleapis.com/cloudml-demo-lcm/SO_ml_tags_avocado_188k_v2.csv

Not sure why you're being downvoted. I also cannot get to at least one dataset -https://storage.googleapis.com/cloudml-demo-lcm/SO_ml_tags_avocado_188k_v2.csv https://storage.googleapis.com/cloudml-demo-lcm/SO_ml_tags_a... which is linked to from the fourth paragraph directly above the "What Is The Bag Of Words Model?" section heading.