Question: Did Jim Clark who uses English die before 1970?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: English
function: Relate
dependencies: 0
inputs: languages spoken, written or signed
backward
function: Find
inputs: Jim Clark
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of death
function: VerifyYear
dependencies: 4
inputs: 1970
<
SPARQL: ASK { ?e <pred:name> "Jim Clark" . ?e <languages_spoken,_written_or_signed> ?e_1 . ?e_1 <pred:name> "English" .  ?e <date_of_death> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1970 ) .  }
Answer: no