Hi! The linked notebook uses COCO from this repository (notice the datasets package in it), and not the one from 
datasets (we are in the process of adding it to the lib). As long as you execute all the commands from the notebook up to that import, the import should work, and locally you can clone the repo and add it to sys.path (import sys; sys.path.insert(0, "path/to/repo")) to make it visible to the import system.
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