Question: How many organizations have the airline callsign of DELTA?
Choices:
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Answer: 1
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "organization" . ?e <callsign_of_airline> ?pv . ?pv <pred:value> "DELTA" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: callsign of airline
DELTA
function: FilterConcept
dependencies: 1
inputs: organization
function: Count
dependencies: 2