Before revision:  On five popular  QA datasets, our model DensePhrases improves  previous phrase retrieval models by 15\%-25\% absolute accuracy and matches the performance of state-of-the-art retriever-reader models.
After revision:  On five popular QA datasets, our model DensePhrases improves over previous phrase retrieval models by 15\%-25\% absolute accuracy and matches the performance of state-of-the-art retriever-reader models.