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Despite piggybacking on the world 's most sensitive radio telescope , Charles Stuart Bowyer said , the instrument could not detect random radio noise emanating from a civilization like ours , which has been leaking radio and TV signals for less than 100 years .
 Charles Stuart Bowyer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Charles Stuart Bowyer