Check this gist [1] for a python script to load dbpedia data [2] into 5.3+ elasticsearch.
Each elasticsearch doc is a single wikipedia article with an array of the other articles it links to.
Using the Graph api/UI in x-pack [3] you can explore strongly-associated subjects (those subjects that are found to be commonly paired together in articles' linked_subjects field).
Cheers,
Mark
[1] https://gist.github.com/markharwood/21c723039425b4b3e4277b2bffa5c54c
[2] http://downloads.dbpedia.org/3.6/en/page_links_en.nt.bz2
[3] https://www.elastic.co/downloads/x-pack