Question: What class of instruments is the musical instrument used by the person whose Dewey Decimal Classification is 923.142?
Choices: mellotron
bagpipes
French horn
Timbales
djembe
didgeridoo
fiddle
xylophone
goblet drum
Bouzouki
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e_1 <instrument> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "human" . ?e_1 <Dewey_Decimal_Classification> ?pv . ?pv <pred:value> "923.142" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Dewey Decimal Classification
923.142
function: FilterConcept
dependencies: 1
inputs: human
function: Relate
dependencies: 2
inputs: instrument
forward
function: FilterConcept
dependencies: 3
inputs: class of instruments
function: What
dependencies: 4
Answer: bagpipes