Question: What number of politicians served as Vice President of the United States?
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Answer: 1
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "politician" . ?e_1 <subject_has_role> ?e . ?e_1 <pred:name> "Vice President of the United States" .   }
Program:
function: Find
inputs: Vice President of the United States
function: Relate
dependencies: 0
inputs: subject has role
forward
function: FilterConcept
dependencies: 1
inputs: politician
function: Count
dependencies: 2