Question: What is the Twitter username of the rock band that is famous for dub?
Choices: DavidSpade
TheRealAnnaCamp
iamjamiefoxx
Twins
deionsanders
London2012
cbc
theclash
earlham1847
SCBastia
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "rock band" . ?e_1 <famous_people> ?e . ?e_1 <pred:name> "dub" .  ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: dub
function: Relate
dependencies: 0
inputs: famous people
forward
function: FilterConcept
dependencies: 1
inputs: rock band
function: QueryAttr
dependencies: 2
inputs: Twitter username
Answer: theclash