Question: When was Tony Curtis (the one that is related to sport American football) born?
Choices:
1951-12-01
1968-03-11
1935-03-11
1970-03-24
1963-02-12
1959-07-26
1983-02-11
1940-11-22
1925-02-17
1942-04-06
Answer: 1983-02-11
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Tony Curtis" . ?e <sport> ?e_1 . ?e_1 <pred:name> "American football" .  ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: American football
function: Relate
dependencies: 0
inputs: sport
backward
function: Find
inputs: Tony Curtis
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth