sumo#sentence  syntactically well-formed formula of a language; it includes, at minimum, a predicate and a subject (which may be explicit or implicit), and it expresses a proposition
  supertype:  linguistic_expression  content bearing objects which are language-related, i.e. both languages and the elements of languages, e.g., words
  subtype:  formula  syntactically well-formed formula in the SUO-KIF knowledge representation language

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