11458
Different combinations of insecticides were administered daily to the experimental groups ( group 1 : cypermethrin + piperonyl butoxide ( PBO ) ; group 2 : alphacypermethrin + PBO ; group 3 : deltamethrin + PBO ; group 4 : cypermethrin + PBO + tetramethrin ; group 5 : alphacypermethrin + PBO + tetramethrin ; and group 6 : deltamethrin + PBO + tetramethrin ) for 28 days .
 Chemical: cypermethrin; Chemical: piperonyl butoxide; Chemical: PBO; Chemical: alphacypermethrin; Chemical: PBO; Chemical: deltamethrin; Chemical: PBO; Chemical: cypermethrin; Chemical: PBO; Chemical: tetramethrin; Chemical: alphacypermethrin; Chemical: PBO; Chemical: tetramethrin; Chemical: deltamethrin; Chemical: PBO
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: cypermethrin; Chemical: piperonyl butoxide; Chemical: PBO; Chemical: alphacypermethrin; Chemical: PBO; Chemical: deltamethrin; Chemical: PBO; Chemical: cypermethrin; Chemical: PBO; Chemical: tetramethrin; Chemical: alphacypermethrin; Chemical: PBO; Chemical: tetramethrin; Chemical: deltamethrin; Chemical: PBO