Question: Is the publication date of the visual artwork that derives Sunset Boulevard (whose lyrics are written by Christopher Hampton) before 1968?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e_1 <based_on> ?e . ?e_1 <pred:name> "Sunset Boulevard" . ?e_1 <lyrics_by> ?e_2 . ?e_2 <pred:name> "Christopher Hampton" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1968 ) .  }
Program:
function: Find
inputs: Christopher Hampton
function: Relate
dependencies: 0
inputs: lyrics by
backward
function: Find
inputs: Sunset Boulevard
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: based on
forward
function: FilterConcept
dependencies: 4
inputs: visual artwork
function: QueryAttr
dependencies: 5
inputs: publication date
function: VerifyYear
dependencies: 6
inputs: 1968
<
Answer: yes