13967
Two block copolymers were formed from this study , including the P3HP - b - 29 % P4HB and P3HP - b - 37 % P4HB , they showed superior properties over random copolymers P ( 3HP - co - 4HB ) .
 Chemical: P3HP; Chemical: P4HB; Chemical: P3HP; Chemical: P4HB; Chemical: P ( 3HP - co - 4HB )
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: P3HP; Chemical: P4HB; Chemical: P3HP; Chemical: P4HB; Chemical: P ( 3HP - co - 4HB )