Question: Who is the person whose Twitter username is weluvbettywhite?
Choices: Chuck Norris
Max Fleischer
Jim O'Rourke
William Henry Harrison
Sylvester Stallone
Betty White
Richard Gere
Ross Turnbull
Orson Scott Card
Joe Biden
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <Twitter_username> ?pv . ?pv <pred:value> "weluvbettywhite" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
weluvbettywhite
function: FilterConcept
dependencies: 1
inputs: human
function: What
dependencies: 2
Answer: Betty White