Question: What are enzymes of drugs used for anemia?
SPARQL:
SELECT DISTINCT ?v1 
WHERE { 
        ?v0 <http://www4.wiwiss.fu-berlin.de/drugbank/resource/drugbank/enzyme> ?v1. 
        ?x <http://www4.wiwiss.fu-berlin.de/diseasome/resource/diseasome/possibleDrug> ?v0.
        ?x rdfs:label ?l.
        FILTER(REGEX(?l,'Anemia','i')). 
}