Question: For rivers with a watershed area smaller than 50000 square kilometers, which is the longest?
Choices: Mississippi River
John Coltrane
Hudson River
River Thames
Danube
Columbia River
Rhine
Amazon
Ohio River
Missouri 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 < "50000"^^xsd:double ) . ?e <length> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: watershed area
50000 square kilometre
<
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: length
largest
Answer: Hudson River