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The epistolary novel as a genre became popular in the 18th century in the works of such authors as Samuel Richardson , with his immensely successful novels " Pamela " ( 1740 ) and " Clarissa " ( 1749 ) .
 Samuel Richardson
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Samuel Richardson