... is to employ ann-gram-based language model to assess whether the extracted arguments share the appropriate relation.Again, this information is not given to the system,so REALM compares the ... us-ing the LEX method (Downey et al., 2007). In ad-dition to locating the proper nouns in the corpus,LEX also concatenates each multi-token proper noun(e.g.,Los Angeles) together into a single token.Both ... of the same type. For a sparse token likePickerington, this is problematic because the token may never occur in a context that preciselymatches that of a seed. In contrast, in the HMM, the non-sparse...