Question: Which person has Twitter username officialdfoster?
Choices: Sylvester Stallone
Michael Piller
Richard Gere
Max Fleischer
Dan Stevens
Mick Jagger
Stephen Gilchrist Glover
Cesar Romero
David Foster
William Henry Harrison
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <Twitter_username> ?pv . ?pv <pred:value> "officialdfoster" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
officialdfoster
function: FilterConcept
dependencies: 1
inputs: human
function: What
dependencies: 2
Answer: David Foster