Question: Was John Hughes (the one that is a member of Sunderland A.F.C.) born before 1969?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: Sunderland A.F.C.
function: Relate
dependencies: 0
inputs: member of sports team
backward
function: Find
inputs: John Hughes
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth
function: VerifyYear
dependencies: 4
inputs: 1969
<
SPARQL: ASK { ?e <pred:name> "John Hughes" . ?e <member_of_sports_team> ?e_1 . ?e_1 <pred:name> "Sunderland A.F.C." .  ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1969 ) .  }
Answer: yes