Question: When did D.C. United member Stephen King start being a member of Chicago Fire (whose Twitter username is ChicagoFire)?
Choices:
1962-10-09
1775
1994-06-25
2017-11-08
1721-10-11
1995-07-01
2008-01-01
1938-01-01
1834-01-09
1918-10-29
Program:
function: Find
inputs: D.C. United
function: Relate
dependencies: 0
inputs: member of sports team
backward
function: Find
inputs: Stephen King
function: And
dependencies: 1
2
function: Find
inputs: Chicago Fire
function: FilterStr
dependencies: 4
inputs: Twitter username
ChicagoFire
function: QueryRelationQualifier
dependencies: 3
5
inputs: member of sports team
start time
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "Stephen King" . ?e_1 <member_of_sports_team> ?e_3 . ?e_3 <pred:name> "D.C. United" . ?e_2 <pred:name> "Chicago Fire" . ?e_2 <Twitter_username> ?pv . ?pv <pred:value> "ChicagoFire" . ?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 .  }
Answer: 2008-01-01