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The length of FeSe filling inside the carbon nanofibers could be varied by controlling the reaction conditions while the diameter of nanowires was dependent on the thickness of Au - Pd coating used as a catalyst .
 Chemical: FeSe; Chemical: carbon; Chemical: Au - Pd
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: FeSe; Chemical: carbon; Chemical: Au - Pd