This module implements TextRank, an unsupervised keyword significance scoring algorithm. TextRank builds a weighted graph representation Of a document Using words As nodes And coocurrence frequencies between pairs of words as edge weights.It then applies PageRank to this graph, And treats the PageRank score of each word as its significance. The original research paper proposing this algorithm Is available here

https://web.eecs.umich.edu/~mihalcea/papers/mihalcea.emnlp04.pdf