Question: How many researchers have the occupation of Carl Sagan?
Choices:
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Answer: 2
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "researcher" . ?e_1 <occupation> ?e . ?e_1 <pred:name> "Carl Sagan" .   }
Program:
function: Find
inputs: Carl Sagan
function: Relate
dependencies: 0
inputs: occupation
forward
function: FilterConcept
dependencies: 1
inputs: researcher
function: Count
dependencies: 2