GO node Word Expansion via proximity measure. (1) For each document, a Boolean matrix of word occurrence in paragraphs (R) is created. (2) Co-occurrence proximity network WPP is computed. (3) Words in GO node label (W
) are expanded (W
) using WPP. (4) Intersection of vector of expanded GO node words (W
) with word vectors for each paragraph in the document (columns of R) : paragraph with largest intersection is returned.