4960
His models were niellos and copper engravings from the workshops of Jacopo de Barbari and Albrecht Dürer .
 Jacopo de Barbari, Albrecht Dürer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Jacopo de Barbari, Albrecht Dürer