Question: When did  Bob Roberts (the one whose date of death is 1950-03-24) become a member of the Wales national football team?
Choices:
1973-10-25
1887-01-01
1832-12-28
2004-04-30
1936-02-10
1919-11-08
1878-07-12
1995-11-27
2010-05-24
1707
Answer: 1887-01-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Bob Roberts" . ?e_1 <date_of_death> ?pv . ?pv <pred:date> "1950-03-24"^^xsd:date . ?e_2 <pred:name> "Wales national football team" . ?e_1 <member_of_sports_team> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <member_of_sports_team> ; <pred:fact_t> ?e_2 ] <end_time> ?qpv .  }
Program:
function: Find
inputs: Bob Roberts
function: FilterDate
dependencies: 0
inputs: date of death
1950-03-24
=
function: Find
inputs: Wales national football team
function: QueryRelationQualifier
dependencies: 1
2
inputs: member of sports team
end time