Question: Did the career of Keith Richards (the one famous for piano) begin after 1945 ?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: piano
function: Relate
dependencies: 0
inputs: famous people
forward
function: Find
inputs: Keith Richards
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: work period (start)
function: VerifyYear
dependencies: 4
inputs: 1945
>
SPARQL: ASK { ?e <pred:name> "Keith Richards" . ?e_1 <famous_people> ?e . ?e_1 <pred:name> "piano" .  ?e <work_period_(start)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1945 ) .  }
Answer: yes