Question: What is the date of birth of the chemist Stephen Jackson?
Choices:
1947-08-09
1962-07-17
1941-05-18
1968-02-12
1974-02-11
1942-01-06
1961-06-10
1970-08-15
1942-10-23
1953-11-12
Answer: 1962-07-17
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Stephen Jackson" . ?e <occupation> ?e_1 . ?e_1 <pred:name> "chemist" .  ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: chemist
function: Relate
dependencies: 0
inputs: occupation
backward
function: Find
inputs: Stephen Jackson
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth