Question: How many popular musics began before 1987 and have Viking metal as a part?
Choices: 0
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "popular music" . ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1987 ) . ?e_1 <part_of> ?e . ?e_1 <pred:name> "Viking metal" .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: inception
1987
<
function: FilterConcept
dependencies: 1
inputs: popular music
function: Find
inputs: Viking metal
function: Relate
dependencies: 3
inputs: part of
forward
function: FilterConcept
dependencies: 4
inputs: popular music
function: And
dependencies: 2
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function: Count
dependencies: 6
Answer: 0