Question: What is the Twitter username for the rock band that has Jon Lord (the one that is famous for keyboard instrument) as a member?
Choices: daniellanois
tahitismith
David_Boreanaz
MsGladysKnight
GameOfThrones
WUSTL
_DeepPurple
Courtney
ascolicalciofc
JessicaBiel
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "rock band" . ?e_1 <member_of> ?e . ?e_1 <pred:name> "Jon Lord" . ?e_2 <famous_people> ?e_1 . ?e_2 <pred:name> "keyboard instrument" .  ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: keyboard instrument
function: Relate
dependencies: 0
inputs: famous people
forward
function: Find
inputs: Jon Lord
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: member of
forward
function: FilterConcept
dependencies: 4
inputs: rock band
function: QueryAttr
dependencies: 5
inputs: Twitter username
Answer: _DeepPurple