Question: When was the single whose genre is Latin pop published?
Choices: 1988-11-17
2001-11-16
1999-09-02
2000-11-23
1977
2004-05-13
2009-09-04
1981-11-20
2006-06-22
1996-07-24
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "single" . ?e <genre> ?e_1 . ?e_1 <pred:name> "Latin pop" .  ?e <publication_date> ?pv .  }
Program:
function: Find
inputs: Latin pop
function: Relate
dependencies: 0
inputs: genre
backward
function: FilterConcept
dependencies: 1
inputs: single
function: QueryAttr
dependencies: 2
inputs: publication date
Answer: 1977