Vlachos and Riedel (2014) constructed a dataset for claim verification consisting of 106 claims, selecting data from fact-checking websites such as PolitiFact, taking advantage of the labelled claims available there.
for instance, it would be interesting to test how approaches similar to natural logic inference (Angeli and Manning, 2014) can be applied, where a knowledge base/graph is constructed by reading the textual sources and then a reasoning process over the claim is applied, possibly using recent advances in neural theorem proving (Rocktäschel and Riedel, 2017).