Question: What is the ending date that John Williams (whose position is defensive back) is a member of Toronto Argonauts?
Choices: 1897-03-04
1975
1328-01-01
2002-05-20
1889-03-04
2009-05-15
2019-03-29
1806-01-23
1999-02-03
1927-01-01
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "John Williams" . ?e_1 <position_played_on_team_/_speciality> ?e_3 . ?e_3 <pred:name> "defensive back" . ?e_2 <pred:name> "Toronto Argonauts" . ?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: defensive back
function: Relate
dependencies: 0
inputs: position played on team / speciality
backward
function: Find
inputs: John Williams
function: And
dependencies: 1
2
function: Find
inputs: Toronto Argonauts
function: QueryRelationQualifier
dependencies: 3
4
inputs: member of sports team
end time
Answer: 1975