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In 1966 , Reed Ghazala discovered and began to teach math " circuit bending " & mdash ; the application of the creative short circuit , a process of chance short-circuiting , creating experimental electronic instruments , exploring sonic elements mainly of timbre and with less regard to pitch or rhythm , and influenced by John Cage ’s aleatoric music concept .
 Reed Ghazala, John Cage
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Reed Ghazala, John Cage