Hossenfeffer

Neither.

Your scenarios are both ‘stabbed by two girls from Wales’. Except if in your Scenario 2 it’s the same girl, in which case it becomes ‘stabbed twice by a girl from Wales’.

What you need is Scenario 3:

• Event 1: Welsh Girl 1 and Welsh Girl 2 stab
• Event 2: Welsh Girl X and Welsh Girl Y stab

Where X could be 1, 2, or other, and Y is the complement to X, or other.

Pretty much all Western countries looked up to the US between 1945 and 2016 (or so).

Are you sure about that? Pretty much all Western countries see America as a convenient bully.