Question: How many kinds of heavy metal invented prior to 1987 include a Van Halen movement?
Choices:
0
1
2
3
4
5
6
7
8
9
Program:
function: Find
inputs: Van Halen
function: Relate
dependencies: 0
inputs: movement
forward
function: FilterConcept
dependencies: 1
inputs: heavy metal
function: FindAll
function: FilterYear
dependencies: 3
inputs: inception
1987
<
function: FilterConcept
dependencies: 4
inputs: heavy metal
function: And
dependencies: 2
5
function: Count
dependencies: 6
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "heavy metal" . ?e_1 <movement> ?e . ?e_1 <pred:name> "Van Halen" .  ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1987 ) .  }
Answer: 0