23092
Porous structures were developed during swelling and degradation in biocomposites with AA but not in those containing HPMA , suggesting different degradation mechanisms : bulk erosion vs . bulk degradation .
 Chemical: HPMA
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: HPMA