Question: How many mechanical waves were created later than 1981 but prior to 1992?
Choices: 53
54
55
56
57
58
59
60
61
62
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "mechanical wave" . ?e <inception> ?pv . ?pv <pred:year> ?v . FILTER ( ?v > 1981 ) . ?e <inception> ?pv_1 . ?pv_1 <pred:year> ?v_1 . FILTER ( ?v_1 < 1992 ) .  }
Program:
function: FindAll
function: FilterYear
dependencies: 0
inputs: inception
1981
>
function: FilterConcept
dependencies: 1
inputs: mechanical wave
function: FindAll
function: FilterYear
dependencies: 3
inputs: inception
1992
<
function: FilterConcept
dependencies: 4
inputs: mechanical wave
function: And
dependencies: 2
5
function: Count
dependencies: 6
Answer: 53