Retrieve all gene variants from wormbase database

Database: 
Statement: 
Retrieve all gene variants from wormbase database
A limit of results per page $number$ (e.g. 10)
Query: 
select* where{ ?s<http://www.w3.org/1999/02/22-rdf-syntax-ns#type><http://bio2rdf.org/wormbase_vocabulary:Gene-Variant> . ?s<http://bio2rdf.org/bio2rdf_vocabulary:identifier>?identifier . } limit ??number
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