Question: In what class of instruments is the instrument used by Sammy Davis Jr.?
Choices: piano
tenor saxophone
bassoon
double bass
Timbales
xylophone
vibraphone
fiddle
mellotron
maraca
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e_1 <instrument> ?e . ?e_1 <pred:name> "Sammy Davis Jr." .   }
Program:
function: Find
inputs: Sammy Davis Jr.
function: Relate
dependencies: 0
inputs: instrument
forward
function: FilterConcept
dependencies: 1
inputs: class of instruments
function: What
dependencies: 2
Answer: vibraphone