Question: Was Elizabeth Taylor (the one whose date of death is 1975-11-19) born before 1904?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Answer: no
SPARQL: ASK { ?e <pred:name> "Elizabeth Taylor" . ?e <date_of_death> ?pv_1 . ?pv_1 <pred:date> "1975-11-19"^^xsd:date . ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1904 ) .  }
Program:
function: Find
inputs: Elizabeth Taylor
function: FilterDate
dependencies: 0
inputs: date of death
1975-11-19
=
function: QueryAttr
dependencies: 1
inputs: date of birth
function: VerifyYear
dependencies: 2
inputs: 1904
<