Question: Was hard rocker Dio's sound invented pre-1991?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "sound" . ?e_1 <genre> ?e . ?e_1 <pred:name> "Dio" . ?e_2 <famous_people> ?e_1 . ?e_2 <pred:name> "hard rock" .  ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1991 ) .  }
Program:
function: Find
inputs: hard rock
function: Relate
dependencies: 0
inputs: famous people
forward
function: Find
inputs: Dio
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: genre
forward
function: FilterConcept
dependencies: 4
inputs: sound
function: QueryAttr
dependencies: 5
inputs: inception
function: VerifyYear
dependencies: 6
inputs: 1991
<
Answer: yes