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Unlike the more advanced PhoneSat-2 .0 spacecraft , Bell is powered by non-rechargeable batteries , and has no attitude control system , however onboard sensors can be used to determine and monitor the satellite 's attitude .
 Bell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bell