46708
The most resistant surface strata on the stepped terrain of the uplands and the heights around the upper reaches of the Enz , which have been heavily eroded by the tributaries of the Murg , is the silicified main conglomerate ( Middle Bunter ) .
 Enz, Murg, Middle Bunter
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Enz, Murg, Middle Bunter