All those enzyme(s) in a chemical reaction that produces a product whose name includes the term introduced

Database: 
Documentation: 
All products that have been generated by a reaction controlled by an enzyme and such enzyme contains the term introduced by a user.
Statement: 

Those enzymes whose product's name contain the term introduced $term$. Display a maximum of $number$ results.

Query: 
select ?substrate ?product ?label_enzyme ?label_product where { ?s<http://www.w3.org/1999/02/22-rdf-syntax-ns#type><http://bio2rdf.org/kegg_vocabulary:Enzyme> . ?s <http://www.w3.org/2000/01/rdf-schema#label> ?label_enzyme . ?s<http://bio2rdf.org/kegg_vocabulary:substrate>?substrate . ?s<http://bio2rdf.org/kegg_vocabulary:product>?product . ?product<http://www.w3.org/2000/01/rdf-schema#label>?label_product. ?label_product bif:contains "'??term'" . } Limit ??number