Question: What is the Hornbostel-Sachs classification for Paul McCartney's string instrument?
Choices: 423.232
422.212-71
321.321-6
121.2
314.122-4
111.241
521
111.242
314.122-5
321.322
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "plucked string instrument" . ?e_1 <instrument> ?e . ?e_1 <pred:name> "Paul McCartney" .  ?e <Hornbostel-Sachs_classification> ?pv .  }
Program:
function: Find
inputs: Paul McCartney
function: Relate
dependencies: 0
inputs: instrument
forward
function: FilterConcept
dependencies: 1
inputs: plucked string instrument
function: QueryAttr
dependencies: 2
inputs: Hornbostel-Sachs classification
Answer: 321.322