Question: Is 1997-11-13 the date of birth for John Carter (graduate of UCLA)?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: no
SPARQL: ASK { ?e <pred:name> "John Carter" . ?e <educated_at> ?e_1 . ?e_1 <pred:name> "University of California, Los Angeles" .  ?e <date_of_birth> ?pv . ?pv <pred:date> "1997-11-13"^^xsd:date .  }
Program:
function: Find
inputs: University of California, Los Angeles
function: Relate
dependencies: 0
inputs: educated at
backward
function: Find
inputs: John Carter
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth
function: VerifyDate
dependencies: 4
inputs: 1997-11-13
=