Question: for the person who died on 1950-04-04 is the date of birth prior to 1989?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <date_of_death> ?pv_1 . ?pv_1 <pred:date> "1950-04-04"^^xsd:date . ?e <date_of_birth> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1989 ) .  }
Program:
function: FindAll
function: FilterDate
dependencies: 0
inputs: date of death
1950-04-04
=
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: date of birth
function: VerifyYear
dependencies: 3
inputs: 1989
<
Answer: yes