Question: Is the publication date after 1990 for the single that uses Spanish?
Choices:
yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
Program:
function: Find
inputs: Spanish
function: Relate
dependencies: 0
inputs: language of work or name
backward
function: FilterConcept
dependencies: 1
inputs: single
function: QueryAttr
dependencies: 2
inputs: publication date
function: VerifyYear
dependencies: 3
inputs: 1990
>
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "single" . ?e <language_of_work_or_name> ?e_1 . ?e_1 <pred:name> "Spanish" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1990 ) .  }
Answer: no