Number of reactions stored in Biomodels

Statement: 
Retrieve the number of reactions stored in Biomodels
A limit of results per page $number$
Query: 
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX sbmlrdf: <http://identifiers.org/biomodels.vocabulary#> SELECT (COUNT(?reaction) as ?number_of_reactions) WHERE { ?reaction rdf:type sbmlrdf:Reaction } limit ??number