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The presence of carbon nanofibers as a shell around the FeSe protected the FeSe nanowires from both atmospheric O 2 and moisture attack , as was evident from the very long ambient condition shelf life of these nanocables , and also makes them more stable under e - beam irradiation .
 Chemical: carbon; Chemical: FeSe; Chemical: FeSe; Chemical: O 2
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: carbon; Chemical: FeSe; Chemical: FeSe; Chemical: O 2