20873
Poly ( vinyl alcohol ) ( PVA ) has been shown to display remarkable ice recrystallization inhibition activity despite its major structural differences to native antifreeze proteins .
 Chemical: Poly ( vinyl alcohol ); Chemical: PVA
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: Poly ( vinyl alcohol ); Chemical: PVA