Question: What is the official website of the Texas county that contains Waco (whose local area code is 254)?
Choices: http://carolelombard.org/
http://www.miramax.com/movie/the-aviator
http://www.ala.org/alsc/awardsgrants/bookmedia/caldecottmedal/caldecottmedal
http://www.jameshong.com
http://www.johnnyenglishreborn.com/
https://www.torontofc.ca/
http://www.oshawa.ca/
http://www.co.mclennan.tx.us
http://www.gundam00.net
http://www.kathrynjoosten.com
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "county of Texas" . ?e_1 <located_in_the_administrative_territorial_entity> ?e . ?e_1 <pred:name> "Waco" . ?e_1 <local_dialing_code> ?pv_1 . ?pv_1 <pred:value> "254" . ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Waco
function: FilterStr
dependencies: 0
inputs: local dialing code
254
function: Relate
dependencies: 1
inputs: located in the administrative territorial entity
forward
function: FilterConcept
dependencies: 2
inputs: county of Texas
function: QueryAttr
dependencies: 3
inputs: official website
Answer: http://www.co.mclennan.tx.us