Question: What is the Twitter username of Dr. Luke, Shakira's producer?
Choices:
Jeff_Daniels
fu_berlin
stevenagefc
FamilyGuyonFOX
SacramentoKings
HP
martineofficial
realronjeremy
alleniverson
thedoctorluke
Answer: thedoctorluke
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e_1 <producer> ?e . ?e_1 <pred:name> "Shakira" . ?e_1 <producer> ?e_2 . ?e_2 <pred:name> "Dr. Luke" .  ?e <Twitter_username> ?pv .  }
Program:
function: Find
inputs: Dr. Luke
function: Relate
dependencies: 0
inputs: producer
backward
function: Find
inputs: Shakira
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: producer
forward
function: FilterConcept
dependencies: 4
inputs: human
function: QueryAttr
dependencies: 5
inputs: Twitter username