Links: http://www.inside-r.org/packages/cran/igraph/docs/triad.census http://stackoverflow.com/questions/12374534/how-to-mine-for-motifs-in-r-with-igraph http://stackoverflow.com/questions/12374534/how-to-mine-for-motifs-in-r-with-igraph http://stackoverflow.com/questions/20190520/listing-triads-in-a-multi-edge-graph https://archive.org/details/2015_reddit_comments_corpus https://www.reddit.com/r/datasets/comments/3mg812/full_reddit_submission_corpus_now_available_2006/