Question: When did  Liam O'Brien (the one that is a member of Portsmouth F.C.) become a member of Dagenham & Redbridge F.C.?
Choices: 1814-01-01
1979-11-22
1999-04-12
1983-06-28
1877-01-01
1992-09-03
2006-02-06
2014-01-01
1972-12-21
1990-04-08
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Liam O'Brien" . ?e_1 <member_of_sports_team> ?e_3 . ?e_3 <pred:name> "Portsmouth F.C." . ?e_2 <pred:name> "Dagenham & Redbridge F.C." . ?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 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: Portsmouth F.C.
function: Relate
dependencies: 0
inputs: member of sports team
backward
function: Find
inputs: Liam O'Brien
function: And
dependencies: 1
2
function: Find
inputs: Dagenham & Redbridge F.C.
function: QueryRelationQualifier
dependencies: 3
4
inputs: member of sports team
start time
Answer: 2014-01-01