Question: When was running back William Powell born?
Choices:
1917-12-22
1811-10-22
1967-10-28
1958-06-17
1904-11-14
1968-02-01
1988-03-09
0980-08-16
1973-04-11
1961-07-30
Answer: 1988-03-09
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "William Powell" . ?e <position_played_on_team_/_speciality> ?e_1 . ?e_1 <pred:name> "running back" .  ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: running back
function: Relate
dependencies: 0
inputs: position played on team / speciality
backward
function: Find
inputs: William Powell
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth