13970
Block copolymerization of P3HP and P4HB adds a new vision on PHA polymerization by generation of new polymers with superior properties .
 Chemical: P3HP; Chemical: P4HB; Chemical: PHA
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: PHA