Question: Is the publication date before 2013 for the visual artwork based on South Pacific that was first performed on 1949-04-07?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "visual artwork" . ?e <based_on> ?e_1 . ?e_1 <pred:name> "South Pacific" . ?e_1 <date_of_first_performance> ?pv_1 . ?pv_1 <pred:date> "1949-04-07"^^xsd:date . ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 2013 ) .  }
Program:
function: Find
inputs: South Pacific
function: FilterDate
dependencies: 0
inputs: date of first performance
1949-04-07
=
function: Relate
dependencies: 1
inputs: based on
backward
function: FilterConcept
dependencies: 2
inputs: visual artwork
function: QueryAttr
dependencies: 3
inputs: publication date
function: VerifyYear
dependencies: 4
inputs: 2013
<
Answer: yes