14188
The spontaneous one - step synthesis of hollow nanocages and nanotubes from spherical and cylindrical micelles based on poly ( acrylic acid ) - b - polylactide ( P ( AA ) - b - P ( LA ) ) block copolymers ( BCPs ) has been achieved .
 Chemical: poly ( acrylic acid ) - b - polylactide; Chemical: P ( AA ) - b - P ( LA )
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 ( acrylic acid ) - b - polylactide; Chemical: P ( AA ) - b - P ( LA )