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Charles Bourseul , Antonio Meucci , Johann Philipp Reis , Alexander Graham Bell , and Elisha Gray , amongst others , have all been credited with the invention of the telephone .
 Charles Bourseul, Antonio Meucci, Johann Philipp Reis, Alexander Graham Bell, Elisha Gray
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 Bourseul, Antonio Meucci, Johann Philipp Reis, Alexander Graham Bell, Elisha Gray