Question: Which river with the Mississippi River as its outlet has the lowest discharge rate?
Choices: Missouri River
Hudson River
Columbia River
Amazon
River Thames
Danube
Ohio River
Mississippi River
Rhine
agnosticism
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <mouth_of_the_watercourse> ?e_1 . ?e_1 <pred:name> "Mississippi River" .  ?e <discharge> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: Find
inputs: Mississippi River
function: Relate
dependencies: 0
inputs: mouth of the watercourse
backward
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: discharge
smallest
Answer: Missouri River