Question: Which electronic musical instrument is used by Lady Gaga ?
Choices: theremin
drum machine
Vocoder
goblet drum
keytar
electronic drum
electric guitar
drum kit
Omnichord
sampler
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "electronic musical instrument" . ?e_1 <instrument> ?e . ?e_1 <pred:name> "Lady Gaga" .   }
Program:
function: Find
inputs: Lady Gaga
function: Relate
dependencies: 0
inputs: instrument
forward
function: FilterConcept
dependencies: 1
inputs: electronic musical instrument
function: What
dependencies: 2
Answer: keytar