13303
There is a strong electronic coupling between ferrocenyl moieties , and superior electron - transport ability exists through these semirigid molecular wires .
 Chemical: ferrocenyl
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: ferrocenyl 
Answer:
 Chemical: ferrocenyl