Question: How long is the landform belonging to the country of Trinidad and Tobago?
Choices: 140 kilometre
609 kilometre
450 kilometre
3444 metre
10885 foot
7001 foot
2557 foot
150 kilometre
1300 kilometre
64 kilometre
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "landform" . ?e <country> ?e_1 . ?e_1 <pred:name> "Trinidad and Tobago" .  ?e <length> ?pv .  }
Program:
function: Find
inputs: Trinidad and Tobago
function: Relate
dependencies: 0
inputs: country
backward
function: FilterConcept
dependencies: 1
inputs: landform
function: QueryAttr
dependencies: 2
inputs: length
Answer: 140 kilometre