Question: What number of video games were published before 1991?
Choices: 17
18
19
20
21
22
23
24
25
26
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "video game" . ?e <publication_date> ?pv . ?pv <pred:year> ?v . FILTER ( ?v < 1991 ) .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: publication date
1991
<
function: FilterConcept
dependencies: 1
inputs: video game
function: Count
dependencies: 2
Answer: 18