Question: How many of heavy metal began before 1990 and are named after contemporary folk music?
Choices: 0
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "heavy metal" . ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1990 ) . ?e <named_after> ?e_1 . ?e_1 <pred:name> "contemporary folk music" .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: inception
1990
<
function: FilterConcept
dependencies: 1
inputs: heavy metal
function: Find
inputs: contemporary folk music
function: Relate
dependencies: 3
inputs: named after
backward
function: FilterConcept
dependencies: 4
inputs: heavy metal
function: And
dependencies: 2
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function: Count
dependencies: 6
Answer: 0