All Pubmed authors according to the last name author introduced

Database: 
Statement: 

Display all authors stored in Pubmed repository according to the last name introduced $label$ (e.g. Kevin).
A limit of results per page $number$ (e.g.100)

Query: 
select ?Pubmed ?last_name ?fore_name where{ ?Pubmed<http://www.w3.org/1999/02/22-rdf-syntax-ns#type><http://bio2rdf.org/pubmed_vocabulary:PubMedRecord> . ?Pubmed<http://bio2rdf.org/pubmed_vocabulary:author>?author_article . ?author_article<http://bio2rdf.org/pubmed_vocabulary:last_name>?last_name . ?author_article<http://bio2rdf.org/pubmed_vocabulary:fore_name>?fore_name . FILTER regex(?last_name, "??label", "i") . } limit ??number