Question: Which person has a Twitter username of willienelson and plays the instrument acoustic guitar?
Choices: Richard Gere
Max Fleischer
Cyndi Lauper
Michael Stipe
Willie Nelson
David Byrne
Joe Satriani
Sylvester Stallone
Miley Cyrus
William Henry Harrison
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <Twitter_username> ?pv . ?pv <pred:value> "willienelson" . ?e <instrument> ?e_1 . ?e_1 <pred:name> "acoustic guitar" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
willienelson
function: FilterConcept
dependencies: 1
inputs: human
function: Find
inputs: acoustic guitar
function: Relate
dependencies: 3
inputs: instrument
backward
function: FilterConcept
dependencies: 4
inputs: human
function: And
dependencies: 2
5
function: What
dependencies: 6
Answer: Willie Nelson