Question: Which person's Twitter username is Diane_Warren?
Choices: Emma Watson
David Banner
Timbaland
William Henry Harrison
Johnny Depp
Ted Kennedy
Diane Warren
Richard Gere
Sylvester Stallone
Karl Urban
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <Twitter_username> ?pv . ?pv <pred:value> "Diane_Warren" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
Diane_Warren
function: FilterConcept
dependencies: 1
inputs: human
function: What
dependencies: 2
Answer: Diane Warren