S contains 5 ⇥ 10 10 tokens (280 GB of plain text) extracted from Web pages as well as around 80,000 sentences from various domain-targeted sources.
for each test set, we use the corresponding training questions Q tr to retrieve domain-relevant sentences from S. for each multiplechoice question (q, A) 2 Q tr and each choice a 2 A, we use all non-stopword stemmed tokens in q and a as an ElasticSearch 1 query against S. We take the top 200 hits, run Open IE v4, 2 and aggregate the resulting tuples over all a 2 A and over all questions in Q tr to create the tuple KB (T ).