Question: Of rivers that are part of Iowa, which has the least amount of discharge?
Choices: Danube
River Thames
Columbia River
Rhine
Ohio River
Missouri River
Amazon
Nome Census Area
Mississippi River
Hudson River
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e_1 <partially_contains> ?e . ?e_1 <pred:name> "Iowa" .  ?e <discharge> ?pv . ?pv <pred:value> ?v .  } ORDER BY ?v LIMIT 1
Program:
function: Find
inputs: Iowa
function: Relate
dependencies: 0
inputs: partially contains
forward
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: discharge
smallest
Answer: Missouri River