We propose two automatic methods to systematically improve the breadth and quality of the prompts used to query the existence of a relation (§ 3).
as shown in Figure 1, these are mining-based methods inspired by previous relation extraction methods (Ravichandran and Hovy, 2002), and paraphrasing-based methods that take a seed prompt (either manually created or automatically mined), and paraphrase it into several other semantically similar expressions.