27801
Recreational use of the cathinone derivative 3 , 4 - methylenedioxypyrovalerone ( MDPV ; " bath salts " ) has increased worldwide in past years , accompanied by accounts of health and legal problems in the popular media and efforts to criminalize possession in numerous jurisdictions .
 Chemical: 3 , 4 - methylenedioxypyrovalerone; Chemical: MDPV
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: 3 , 4 - methylenedioxypyrovalerone; Chemical: MDPV