Display all drug names related to its active ingredient

Database: 
Statement: 

Display all drug names related to its active ingredient. A limit of results per page $number$ (e.g10)

Query: 
PREFIX dailymed: <http://wifo5-04.informatik.uni-mannheim.de/dailymed/resource/dailymed/> PREFIX db: <http://wifo5-04.informatik.uni-mannheim.de/dailymed/resource/> SELECT DISTINCT ?drug ?ingredient WHERE { ?s rdf:type dailymed:drugs . ?s rdfs:label ?drug . ?s dailymed:activeIngredient ?ingredient . } LIMIT ??number