What is the {negative emotion} for {drug used for treatment} of {cocaine}
who  is the negative emotion for drug used for treatment of cocaine?
 select distinct ?sbj where { ?sbj wdt:P2176 wd:Q41576 . ?sbj wdt:P31 wd:Q60539481 } 
select distinct ?subj where { ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#subject> ?subj . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#predicate> <http://www.wikidata.org/entity/P2176> . ?statement <http://www.w3.org/1999/02/22-rdf-syntax-ns#object> <http://wikidata.dbpedia.org/resource/Q41576> . ?subj <http://www.wikidata.org/entity/P31> <http://wikidata.dbpedia.org/resource/Q60539481> } 
In treating cocaine, what drug is used?