2408
pH - and thermo - sensitive pluronic / poly ( acrylic acid ) in situ hydrogels for sustained release of an anticancer drug .
 Chemical: pluronic; Chemical: poly ( acrylic acid )
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: pluronic; Chemical: poly ( acrylic acid )