24967
Poly ( vinyl alcohol ) Physical Hydrogel Nanoparticles , Not Polymer Solutions , Exert Inhibition of Nitric Oxide Synthesis in Cultured Macrophages .
 Chemical: Poly ( vinyl alcohol ); Chemical: Nitric Oxide
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: Nitric Oxide