Question: What is the birth date of a person competing in the 1908 Summer Olympics?
Choices: 1977-04-02
1770-12-17
1884-12-07
1992-02-08
1941-09-11
1967-09-11
1957-03-02
1969-12-29
1922-03-04
1965-01-12
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <participant_of> ?e_1 . ?e_1 <pred:name> "1908 Summer Olympics" .  ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: 1908 Summer Olympics
function: Relate
dependencies: 0
inputs: participant of
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: date of birth
Answer: 1884-12-07