Display all active sites according to an introduced term

Database: 
Statement: 
Display all active sites according to an introduced term $term$ (e.g, Adenylosuccinate synthase)
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/interpro_vocabulary:Active_site> . ?s<http://www.w3.org/2000/01/rdf-schema#label>?label . ?s<http://purl.org/dc/terms/description>?Description . filter REGEX(?label, "??term", "i") } limit ??number