Question: What class of instruments are used by famous people such as Lily Allen?
Choices:
vibraphone
French horn
keytar
indie pop
soprano saxophone
alternative rock
timpani
sampler
rhythm and blues
glockenspiel
Answer: glockenspiel
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e <famous_people> ?e_1 . ?e_1 <pred:name> "Lily Allen" .   }
Program:
function: Find
inputs: Lily Allen
function: Relate
dependencies: 0
inputs: famous people
backward
function: FilterConcept
dependencies: 1
inputs: class of instruments
function: What
dependencies: 2