Question: Which US city is the twin administrative body of Thunder Bay, occupying 447500000 sq. meters?
Choices:
Port Huron
Waukegan
Boulder
Duluth
Oakland
Columbus
Franklin
New Haven
Compton
Mansfield
Answer: Duluth
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "city of the United States" . ?e <twinned_administrative_body> ?e_1 . ?e_1 <pred:name> "Thunder Bay" . ?e_1 <area> ?pv . ?pv <pred:unit> "square metre" . ?pv <pred:value> "447500000"^^xsd:double .   }
Program:
function: Find
inputs: Thunder Bay
function: FilterNum
dependencies: 0
inputs: area
447500000 square metre
=
function: Relate
dependencies: 1
inputs: twinned administrative body
backward
function: FilterConcept
dependencies: 2
inputs: city of the United States
function: What
dependencies: 3