Question: Vector semantics ( TF - IDF and PPMI vectors ) ( 5 0 points ) 1 . Considering the first 1 0 0 0 sentences

Vector semantics (TF-IDF and PPMI vectors)(50 points)
1. Considering the first 1000 sentences of the Brown corpus (corpus[0:1000]), regard each sentence as a document and write a program to compute the TF-IDF for each word (20 points). Compute the TF-IDF for the words county, investigation and produced of the first document of the corpus. (5 points).

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