6557
Clement of Alexandria , Tertullian , and the Muratorian canon considered the letter canonical .
 Clement of Alexandria, Tertullian, Muratorian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Clement of Alexandria, Tertullian, Muratorian