GUM is an open source multilayer English corpus of richly annotated texts from twelve text types. Annotations include:

• Multiple POS tags, morphological features and lemmatization
• Sentence segmentation and rough speech act
• Document structure in TEI XML (paragraphs, headings, figures, etc.)
• ISO date/time annotations
• Speaker and addressee information (where relevant)
• Constituent and dependency syntax
• Information status (given, accessible, new, split antecedent)
• Entity and coreference annotation, including bridging anaphora
• Entity linking (Wikification)
• Discourse parses in Rhetorical Structure Theory and discourse dependencies