Question: Which has the smallest watershed area among the rivers whose watershed area is less than 810000 square kilometres?
Choices: Rhine
Ohio River
Mississippi River
Hudson River
Missouri River
Danube
River Thames
2012 Summer Olympics
Columbia River
Amazon
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 < "810000"^^xsd:double ) . ?e <watershed_area> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: watershed area
810000 square kilometre
<
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: watershed area
smallest
Answer: River Thames