Question: What's the official website of the Oregon (population 2091385) metro area?
Choices:
http://haroldfaltermeyer.net/
http://www.conservatory.ru/
http://www.ci.burbank.ca.us/
http://nicklachey.com/
http://www.picasso.fr
https://www.cu-fc.com/
http://www.co.imperial.ca.us/
http://www.daggers.co.uk/
http://www.romefloyd.com/
http://www.oregonmetro.gov
Answer: http://www.oregonmetro.gov
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "metropolitan area" . ?e <located_in_the_administrative_territorial_entity> ?e_1 . ?e_1 <pred:name> "Oregon" . ?e_1 <population> ?pv_1 . ?pv_1 <pred:unit> "1" . ?pv_1 <pred:value> "2091385"^^xsd:double . ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Oregon
function: FilterNum
dependencies: 0
inputs: population
2091385
=
function: Relate
dependencies: 1
inputs: located in the administrative territorial entity
backward
function: FilterConcept
dependencies: 2
inputs: metropolitan area
function: QueryAttr
dependencies: 3
inputs: official website