Question: Which American football team has Chris Brown (the one whose position is defensive back) as a member (the end time of this statement is 1985)?
Choices: Pittsburgh Steelers
Buffalo Bills
Carolina Panthers
Chicago Bears
Miami Dolphins
New England Patriots
New Orleans Saints
California Golden Bears football
Atlanta Falcons
Oklahoma Sooners football
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "American football team" . ?e_1 <member_of_sports_team> ?e . ?e_1 <pred:name> "Chris Brown" . ?e_1 <position_played_on_team_/_speciality> ?e_2 . ?e_2 <pred:name> "defensive back" .  [ <pred:fact_h> ?e_1 ; <pred:fact_r> <member_of_sports_team> ; <pred:fact_t> ?e ] <end_time> ?qpv . ?qpv <pred:year> 1985 .  }
Program:
function: Find
inputs: defensive back
function: Relate
dependencies: 0
inputs: position played on team / speciality
backward
function: Find
inputs: Chris Brown
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: member of sports team
forward
function: QFilterYear
dependencies: 4
inputs: end time
1985
=
function: FilterConcept
dependencies: 5
inputs: American football team
function: What
dependencies: 6
Answer: Pittsburgh Steelers