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He and his first wife raised eight children , including an orphaned son of Lanson Clark , Richard C. Clark , for whom R. C. Clark High School ( also in PISD ) is named .
 Clark, C. Clark, R. C. Clark High School
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Clark, C. Clark, R. C. Clark High School