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Paul Ringer writes that " these teenaged efforts reveal palpable ambition matched with a convincing mastery of contemporary style " , but at this stage they display their creator 's competence rather than any striking originality .
 Paul Ringer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Paul Ringer