Question: Which class of instruments is the instrument used by Sufjan Stevens in?
Choices: banjo
concertina
clavinet
goblet drum
guitar
hammered dulcimer
baritone saxophone
keytar
bagpipes
oboe
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e_1 <instrument> ?e . ?e_1 <pred:name> "Sufjan Stevens" .   }
Program:
function: Find
inputs: Sufjan Stevens
function: Relate
dependencies: 0
inputs: instrument
forward
function: FilterConcept
dependencies: 1
inputs: class of instruments
function: What
dependencies: 2
Answer: oboe