Research using Freebase data grew again in 2013. We cataloged 68 new papers (versus 59 in 2012) in our +Mendeley
Trending topics of research for 2013 included natural language processing (11 papers), relation extraction (10) and entity linking (6). Linked data (6) and RDF (3) continued to rank highly as they did in 2012.
If you're working on a research project that touches on any of these topics you should take a look at the Freebase RDF data dump (https://developers.google.com/freebase/data
). Its free with attribution and contains high-quality, structured data about 42M+ real-world entities.