Hi! Can you clarify? This is a fairly standard use of "context" (http://www.socher.org/index.php/Main/ImprovingWordRepresenta...). While the algorithm can be used with just the covariance of a corpus's word vectors, accounting for the distribution of a context when setting up the distance metric acts to improve performance substantially (https://i.imgur.com/Dnx9c9G.jpg)