7189
In Ovid 's " Pyramus and Thisbe " , the origin of the color of mulberries is explained , as the white berries become stained red from the blood gushing forth from their double suicide .
 Ovid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ovid