Question: Was Van Heflin born prior to 1958?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: Van Heflin
function: QueryAttr
dependencies: 0
inputs: date of birth
function: VerifyYear
dependencies: 1
inputs: 1958
<
SPARQL: ASK { ?e <pred:name> "Van Heflin" . ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1958 ) .  }
Answer: yes