Question: What is the date of birth of Joe Jackson who was born in Burton upon Trent?
Choices:
1937-07-18
1911-01-11
1954-08-11
1816-09-06
1986-12-18
1890-10-16
1959-06-26
1955-06-27
1968-11-18
1955-10-07
Answer: 1954-08-11
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Joe Jackson" . ?e <place_of_birth> ?e_1 . ?e_1 <pred:name> "Burton upon Trent" .  ?e <date_of_birth> ?pv .  }
Program:
function: Find
inputs: Burton upon Trent
function: Relate
dependencies: 0
inputs: place of birth
backward
function: Find
inputs: Joe Jackson
function: And
dependencies: 1
2
function: QueryAttr
dependencies: 3
inputs: date of birth