Question: How many rivers have a watershed area greater than 23000 square km?
Choices: 7
8
9
10
11
12
13
14
15
16
SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <watershed_area> ?pv . ?pv <pred:unit> "square kilometre" . ?pv <pred:value> ?v . FILTER ( ?v > "23000"^^xsd:double ) .  }
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: watershed area
23000 square kilometre
>
function: FilterConcept
dependencies: 1
inputs: river
function: Count
dependencies: 2
Answer: 8