Question: Is the popular music associated with John Lee Hooker from before 1959?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: John Lee Hooker
function: Relate
dependencies: 0
inputs: famous people
backward
function: FilterConcept
dependencies: 1
inputs: popular music
function: QueryAttr
dependencies: 2
inputs: inception
function: VerifyYear
dependencies: 3
inputs: 1959
<
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "popular music" . ?e <famous_people> ?e_1 . ?e_1 <pred:name> "John Lee Hooker" .  ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1959 ) .  }
Answer: yes