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Approaches For the Too Many Answers Problem in Knowledge Bases. Four algorithms are provided:

  • Base: executes all subqueries of a failing query,
  • BFS: does not execute queries that have a succeeding superquery,
  • Var: BFS + uses a variable-based property to deduce query failure,
  • Card: Var + uses a cardinality-based property to deduce query failure.

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