42389
The Usk valley contains many sites of prehistorical archaeological significance and the valley has long been a trade route , settlement area and an avenue into Wales for successive invaders such as the Romans and Normans .
 Usk, Wales
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Usk, Wales