11 The reinforced extractor performs the best, because of the ability to get the summary-level reward and the reduced train-test mismatch of feeding the previous extraction decision.
we do get a small further boost to the summary quality by removing a few 'across-sentence' repetitions, via a simple reranking strategy: At sentence-level, we apply the same beam-search tri-gram avoidance (Paulus et al., 2018).