Question

the last group of raiders to terrorize western europe were the vikings, fierce scandinavian warriors who almost overran england before king alfred negotiated peace with king Guthrum of the danes.

Answer 1

Assuming that you want to find the common nouns from those sentences,

common noun are the one that refer to general items, not the specific one.

example of common nouns :
- Raiders
- Europe
- warriors
- King

Hope this helps