Question: What drum's famous person is the individual whose Twitter username is joancbaez?
Choices: guitar
xylophone
Timbales
didgeridoo
djembe
bongo drum
snare drum
contemporary folk music
ukulele
goblet drum
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "drum" . ?e <famous_people> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "human" . ?e_1 <Twitter_username> ?pv . ?pv <pred:value> "joancbaez" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Twitter username
joancbaez
function: FilterConcept
dependencies: 1
inputs: human
function: Relate
dependencies: 2
inputs: famous people
backward
function: FilterConcept
dependencies: 3
inputs: drum
function: What
dependencies: 4
Answer: djembe