Question: Is the work period start before 1992 for the person that produced A Star Is Born that has Lady Gaga as a performer?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <producer> ?e . ?e_1 <pred:name> "A Star Is Born" . ?e_1 <performer> ?e_2 . ?e_2 <pred:name> "Lady Gaga" .  ?e <work_period_(start)> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1992 ) .  }
Program:
function: Find
inputs: Lady Gaga
function: Relate
dependencies: 0
inputs: performer
backward
function: Find
inputs: A Star Is Born
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: producer
forward
function: FilterConcept
dependencies: 4
inputs: human
function: QueryAttr
dependencies: 5
inputs: work period (start)
function: VerifyYear
dependencies: 6
inputs: 1992
<
Answer: no