Question: Who is the producer of the single published in 1981?
Choices: Phil Spector
Jared Leto
Peter Lawford
Vangelis
Freddie Mercury
Robert Evans
Warren Beatty
Robert Chartoff
Madonna
George Lucas
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <producer> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "single" . ?e_1 <publication_date> ?pv . ?pv <pred:year> 1981 .   }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: publication date
1981
=
function: FilterConcept
dependencies: 1
inputs: single
function: Relate
dependencies: 2
inputs: producer
forward
function: FilterConcept
dependencies: 3
inputs: human
function: What
dependencies: 4
Answer: Vangelis