A question about plot"Fleeing to the Wall"

By aoke, in 2. AGoT Rules Discussion

I check this card's text: Others. When revealed, each player chooses up to 3 locations. All locations not chosen are discarded from play(cannot be saved).

My question is : what the word "Others" means. It shows at the beginning of the whole text. I have no problem with the later text and use it like that: everyone, including this plot card owner, discarded all location except three left. But what the Other means!!

Notice that it is in bold, italic type. That makes it a trait. Like "City," "River," or "Military Battle." Traits don't mean anything by themselves. They are just a way for cards to interact with each other. So the word "Others" doesn't mean anything on this plot.

The confusing part is that nothing in the LCG interacts with the "Others" trait. But there's always the possibility that something will, eventually.

Thank you so much for the explanation