(We had an issue with Chrome screen sharing so skip forward to 5:50 where we properly get started - https://www.youtube.com/watch?v=bIErDD2Hnhg&feature=youtu.be&t=350)
To get insights from between the lines, you can correlate and categorize the tags of StackOverflow based on the questions they are attached to.
In this talk Michael Hunger will show us how to use the Jaccard procedure in the Neo4j-Graph-Algorithms library to achieve that.
We imported the whole dump of StackOverflow into Neo4j, ran the algorithms and then visualized the results using Neo4j Browser and the large graph visualization tool Graphistry.