30641
Owing to their exceptionally long spin lifetimes , these carbon - based materials could also have an important impact on spintronics , where carrier spins play a key role in transmitting , processing and storing information .
 Chemical: carbon
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: carbon 
Answer:
 Chemical: carbon