Question: What is the string instrument whose celebrated individual is Keith Jarrett
Choices:
piano
harp
viola
avant-garde jazz
cello
hurdy-gurdy
harpsichord
post-bop
Appalachian dulcimer
classical music
Answer: harpsichord
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "string instrument" . ?e <famous_people> ?e_1 . ?e_1 <pred:name> "Keith Jarrett" .   }
Program:
function: Find
inputs: Keith Jarrett
function: Relate
dependencies: 0
inputs: famous people
backward
function: FilterConcept
dependencies: 1
inputs: string instrument
function: What
dependencies: 2