Question: Did the professional life of the person born on 1960-04-26 begin prior to 1890 ?
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_birth> ?pv_1 . ?pv_1 <pred:date> "1960-04-26"^^xsd:date . ?e <work_period_(start)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1890 ) .  }
Program:
function: FindAll
function: FilterDate
dependencies: 0
inputs: date of birth
1960-04-26
=
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: work period (start)
function: VerifyYear
dependencies: 3
inputs: 1890
<
Answer: no