Question: How many singles from the United States of America were published after 1987?
Choices:
9
10
11
12
13
14
15
16
17
18
Program:
function: Find
inputs: United States of America
function: Relate
dependencies: 0
inputs: country of origin
backward
function: FilterConcept
dependencies: 1
inputs: single
function: FindAll
function: FilterYear
dependencies: 3
inputs: publication date
1987
>
function: FilterConcept
dependencies: 4
inputs: single
function: And
dependencies: 2
5
function: Count
dependencies: 6
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "single" . ?e <country_of_origin> ?e_1 . ?e_1 <pred:name> "United States of America" .  ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1987 ) .  }
Answer: 15