22591
Impact of DNA Sequence and Oligonucleotide Length on a Polythiophene - Based Fluorescent DNA Biosensor .
 Chemical: Polythiophene
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: Polythiophene 
Answer:
 Chemical: Polythiophene