Question: Where is the watershed area of a river whose basin is situated in Switzerland?
Choices: 185000 square kilometre
207200 square kilometre
58800 square kilometre
34600 square kilometre
2981000 square kilometre
528100 square kilometre
817000 square kilometre
1371010 square kilometre
7050000 square kilometre
668217 square kilometre
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "river" . ?e <basin_country> ?e_1 . ?e_1 <pred:name> "Switzerland" .  ?e <watershed_area> ?pv .  }
Program:
function: Find
inputs: Switzerland
function: Relate
dependencies: 0
inputs: basin country
backward
function: FilterConcept
dependencies: 1
inputs: river
function: QueryAttr
dependencies: 2
inputs: watershed area
Answer: 185000 square kilometre