Question: What class of instrumest with the official website of http://www.mellotron.com has the Hornbostel-Sachs classification of 521?
Choices: yes
no
unknown
unknown
unknown
unknown
unknown
unknown
unknown
unknown
SPARQL: ASK { ?e <pred:instance_of> ?c . ?c <pred:name> "class of instruments" . ?e <official_website> ?pv_1 . ?pv_1 <pred:value> "http://www.mellotron.com" . ?e <Hornbostel-Sachs_classification> ?pv . ?pv <pred:value> "521" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: official website
http://www.mellotron.com
function: FilterConcept
dependencies: 1
inputs: class of instruments
function: QueryAttr
dependencies: 2
inputs: Hornbostel-Sachs classification
function: VerifyStr
dependencies: 3
inputs: 521
Answer: no