Question: How many rivers have a watershed area under 250000 square kilometres?
Choices: 0
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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 < "250000"^^xsd:double ) .  }
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: watershed area
250000 square kilometre
<
function: FilterConcept
dependencies: 1
inputs: river
function: Count
dependencies: 2
Answer: 3