Question: Of rivers with a watershed area not equal to or exceeding 720000 square kilometres, which has the greatest area of watershed?
Choices: Danube
Rhine
Nigeria
River Thames
Missouri River
Mississippi River
Ohio River
Columbia River
Amazon
Hudson River
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <watershed_area> ?pv_1 . ?pv_1 <pred:unit> "square kilometre" . ?pv_1 <pred:value> ?v_1 . FILTER ( ?v_1 < "720000"^^xsd:double ) . ?e <watershed_area> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: watershed area
720000 square kilometre
<
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: watershed area
largest
Answer: Columbia River