6199
Previous studies investigated the effect of permethrin ( PERM ) administered at 34 mg / kg , a dose close to the no observable adverse effect level ( NOAEL ) from post natal day ( PND ) 6 to PND 21 in rats .
 Chemical: permethrin; Chemical: PERM
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: permethrin, PERM 
Answer:
 Chemical: permethrin; Chemical: PERM