The ISNotes dataset is a corpus used for fine-grained Information Status (IS) classification. IS reflects the accessibility of a discourse entity based on the evolving discourse context and the speaker’s assumption about the hearer’s knowledge and beliefs. According to Markert et al. (2012), old mentions refer to entities that have been referred to previously; mediated mentions have not been mentioned before but are accessible to the hearer by reference to another old mention or to prior world knowledge; and new mentions refer to entities that are introduced to the discourse for the first time and are not known to the hearer before.