9261
The dissolution speed of the polymer films was found to be dependent on the concentration of polymer solution , where at least 65 % of the films were shown to dissolve into nanometer sized polymer fragments within 2min .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None