Question: When was born Colin Wilson (the  one whose position is defender)?
Choices:
1969-10-11
1945-09-26
1898-11-29
1921-09-30
1949-07-27
1969-06-15
1916-02-26
1859-04-08
1993-05-19
1792-02-29
Program:
function: Find
inputs: defender
function: Relate
dependencies: 0
inputs: position played on team / speciality
backward
function: Find
inputs: Colin Wilson
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Colin Wilson" . ?e <position_played_on_team_/_speciality> ?e_1 . ?e_1 <pred:name> "defender" .  ?e <date_of_birth> ?pv .  }
Answer: 1993-05-19