Question: What is the official website of the human that is a performer of Monster, which also has BT as a performer?
Choices: http://www.dulwich.org.uk/
http://www.santafenm.gov/
http://www.fxnetworks.com/shows/originals/the_shield/
http://www.btmusic.com
http://www.unco.edu
https://www.belgium.be
http://www.davidbrin.com/
https://www.gla.ac.uk/
http://ci.chillicothe.oh.us/
http://www.genesis-music.com/
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <performer> ?e . ?e_1 <pred:name> "Monster" . ?e_1 <performer> ?e_2 . ?e_2 <pred:name> "BT" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: BT
function: Relate
dependencies: 0
inputs: performer
backward
function: Find
inputs: Monster
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: performer
forward
function: FilterConcept
dependencies: 4
inputs: human
function: QueryAttr
dependencies: 5
inputs: official website
Answer: http://www.btmusic.com