Display all acid type chemicals stored in this endpoint

Database: 
Statement: 

$number$

Query: 
PREFIX db: <http://wifo5-04.informatik.uni-mannheim.de/stitch/resource/> SELECT DISTINCT ?s ?name WHERE { ?s rdf:type db:stitch/chemicals . ?s db:stitch/name ?name . Filter regex (?name, "acid", "i") } LIMIT ??number