I love the ambiguity of "label" here, Neil,
but I can't help feeling that S2 is confusing the reader (well, at least this reader) unnecessarily, since the difference between
who's/whose and others/other's can only be seen on the page but not heard.
Besides I think that, with these, you might be on thin ice, grammatically speaking.
Instead of just sitting on the fence - why not stand in the middle of the road?