Question: Is the date of birth of Ben Gibbard 1961-03-31?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: no
SPARQL: ASK { ?e <pred:name> "Ben Gibbard" . ?e <date_of_birth> ?pv . ?pv <pred:date> "1961-03-31"^^xsd:date .  }
Program:
function: Find
inputs: Ben Gibbard
function: QueryAttr
dependencies: 0
inputs: date of birth
function: VerifyDate
dependencies: 1
inputs: 1961-03-31
=