I just saw a sentence "Stop stealing from firefighters, who are trying to save the province. Have some respect for us on the line". As far as I'm concerned, pronouns such as 'he', 'she', 'us' cannot be modified by any word in English. But it seems like in that sentence, "On the line" modifies "us" to me. So I'm not sure how to interpret the sentence. Does "on the line" modifies "us"..? in other words, Should I interpret it like "Have some respect for (those of) us (who are) on the line"? or "On the line, Have some respect for us"??