Question: The language designated by WALS lect code ydd is used by how many surnames?
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "family name" . ?e <language_of_work_or_name> ?e_1 . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "language" . ?e_1 <WALS_lect_code> ?pv . ?pv <pred:value> "ydd" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: WALS lect code
ydd
function: FilterConcept
dependencies: 1
inputs: language
function: Relate
dependencies: 2
inputs: language of work or name
backward
function: FilterConcept
dependencies: 3
inputs: family name
function: Count
dependencies: 4
Answer: 0