Question: How many electronic musical instruments are known in the world hose Hornbostel-Sachs classification is 531.1 and whose official website is http://www.suzukimusic.co.uk/omnichord/suzuki_omnichord.htm ?
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "electronic musical instrument" . ?e <Hornbostel-Sachs_classification> ?pv . ?pv <pred:value> "531.1" . ?e <official_website> ?pv_1 . ?pv_1 <pred:value> "http://www.suzukimusic.co.uk/omnichord/suzuki_omnichord.htm" .  }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: Hornbostel-Sachs classification
531.1
function: FilterConcept
dependencies: 1
inputs: electronic musical instrument
function: FindAll
function: FilterStr
dependencies: 3
inputs: official website
http://www.suzukimusic.co.uk/omnichord/suzuki_omnichord.htm
function: FilterConcept
dependencies: 4
inputs: electronic musical instrument
function: And
dependencies: 2
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function: Count
dependencies: 6
Answer: 0