27450
Fibrillar Morphology of Derivatives of Poly ( 3 - alkylthiophene ) s by Solvent Vapor Annealing : Effects of Conformational Transition and Conjugate Length .
 Chemical: Poly ( 3 - alkylthiophene ) s
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: Poly ( 3 - alkylthiophene ) s 
Answer:
 Chemical: Poly ( 3 - alkylthiophene ) s