Question: What is the official website of the human whose Twitter username is kelly_clarkson?
Choices: http://www.oxfordcounty.org
http://www.perthairport.net.au
http://www.minniedriver.com
http://www.lebronjames.com
https://www.yorkcityfootballclub.co.uk/
http://www.jamesmarsters.com
http://www.thisisenglandmovie.co.uk/
http://brasil.bbchd.com/
http://www.kellyclarkson.com/
http://www.bangkok.go.th/
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <Twitter_username> ?pv_1 . ?pv_1 <pred:value> "kelly_clarkson" . ?e <official_website> ?pv .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
kelly_clarkson
function: FilterConcept
dependencies: 1
inputs: human
function: QueryAttr
dependencies: 2
inputs: official website
Answer: http://www.kellyclarkson.com/