Question: How does Hornbostel-Sachs classify the electric piano played by Tori Amos?
Choices: 423.233
111.222
111.232
511
321.321-72
321.322-5
422.211.2-71
211.11
422.112-71
131.22
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "electric piano" . ?e_1 <instrument> ?e . ?e_1 <pred:name> "Tori Amos" .  ?e <Hornbostel-Sachs_classification> ?pv .  }
Program:
function: Find
inputs: Tori Amos
function: Relate
dependencies: 0
inputs: instrument
forward
function: FilterConcept
dependencies: 1
inputs: electric piano
function: QueryAttr
dependencies: 2
inputs: Hornbostel-Sachs classification
Answer: 511