Question: When did the person who was born in Iowa die?
Choices:
1922-08-22
2001-12-02
2005-02-10
1970-02-14
1971-07-03
1971-02-11
2009-05-02
1994-09-20
1939-03-12
1998-10-03
Answer: 1971-02-11
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <place_of_birth> ?e_1 . ?e_1 <pred:name> "Iowa" .  ?e <date_of_death> ?pv .  }
Program:
function: Find
inputs: Iowa
function: Relate
dependencies: 0
inputs: place of birth
backward
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: date of death