Question: Of rivers whose elevation relative to sea level is more than -30 metres, which has the greatest watershed area>
Choices: Rhine
Amazon
Danube
Columbia River
Hudson River
Chris Wood
Ohio River
Mississippi River
River Thames
Missouri River
SPARQL: SELECT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <elevation_above_sea_level> ?pv_1 . ?pv_1 <pred:unit> "metre" . ?pv_1 <pred:value> ?v_1 . FILTER ( ?v_1 > "-30"^^xsd:double ) . ?e <watershed_area> ?pv . ?pv <pred:value> ?v .  } ORDER BY DESC(?v) LIMIT 1
Program:
function: FindAll
function: FilterNum
dependencies: 0
inputs: elevation above sea level
-30 metre
>
function: FilterConcept
dependencies: 1
inputs: river
function: SelectAmong
dependencies: 2
inputs: watershed area
largest
Answer: Amazon