Question: When did  James Taylor (the one that plays the instrument guitar)  become Carly Simon's spouse?
Choices: 1976-01-01
2007-09-19
2012-10-10
1992-01-03
1621-09-25
1999-06-25
2002-01-01
1600
1991-12-27
1922-02-20
SPARQL: SELECT DISTINCT ?qpv WHERE { ?e_1 <pred:name> "James Taylor" . ?e_1 <instrument> ?e_3 . ?e_3 <pred:name> "guitar" . ?e_2 <pred:name> "Carly Simon" . ?e_1 <spouse> ?e_2 . [ <pred:fact_h> ?e_1 ; <pred:fact_r> <spouse> ; <pred:fact_t> ?e_2 ] <start_time> ?qpv .  }
Program:
function: Find
inputs: guitar
function: Relate
dependencies: 0
inputs: instrument
backward
function: Find
inputs: James Taylor
function: And
dependencies: 1
2
function: Find
inputs: Carly Simon
function: QueryRelationQualifier
dependencies: 3
4
inputs: spouse
start time
Answer: 1976-01-01