Question: When was the disco album published?
Choices: 1979-05-23
2006-12-11
1970-03-05
2004-10-26
2004-09-30
2012-05-10
2012-04-13
1988-11-10
2014-12-04
1997-03-07
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "album" . ?e <genre> ?e_1 . ?e_1 <pred:name> "disco" .  ?e <publication_date> ?pv .  }
Program:
function: Find
inputs: disco
function: Relate
dependencies: 0
inputs: genre
backward
function: FilterConcept
dependencies: 1
inputs: album
function: QueryAttr
dependencies: 2
inputs: publication date
Answer: 1979-05-23