Question: Was the disco album published earlier than 2011?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "album" . ?e <genre> ?e_1 . ?e_1 <pred:name> "disco" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 2011 ) .  }
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
function: VerifyYear
dependencies: 3
inputs: 2011
<
Answer: yes