Question: Who is the spouse of Elvis Costello (the point in time of this statement is 2003-12-06) ?
Choices:
Sylvester Stallone
David Byrne
Rahul Dev Burman
James E. Reilly
Diana Krall
Babyface
Paul Simon
Simon Cowell
Max Fleischer
William Henry Harrison
Program:
function: Find
inputs: Elvis Costello
function: Relate
dependencies: 0
inputs: spouse
backward
function: QFilterDate
dependencies: 1
inputs: point in time
2003-12-06
=
function: FilterConcept
dependencies: 2
inputs: human
function: What
dependencies: 3
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <spouse> ?e_1 . ?e_1 <pred:name> "Elvis Costello" .  [ <pred:fact_h> ?e ; <pred:fact_r> <spouse> ; <pred:fact_t> ?e_1 ] <point_in_time> ?qpv . ?qpv <pred:date> "2003-12-06"^^xsd:date .  }
Answer: Diana Krall