Question: When did  Carole Lombard become William Powell's (the one whose date of death is 1984-03-05) spouse?
Choices: 1840
1922-12-05
1426
2011-04-07
1979-02-18
1994-05-01
1950-09-28
1704
1931-01-01
2018-01-18
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Carole Lombard" . ?e_2 <pred:name> "William Powell" . ?e_2 <date_of_death> ?pv . ?pv <pred:date> "1984-03-05"^^xsd:date . ?e_1 <spouse> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <spouse> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Carole Lombard
function: Find
inputs: William Powell
function: FilterDate
dependencies: 1
inputs: date of death
1984-03-05
=
function: QueryRelationQualifier
dependencies: 0
2
inputs: spouse
start time
Answer: 1931-01-01