A man is in midair, skiing.
There is a man skiing.
Both sentence are talking about man skiing.
exists p1 x1.(exists x2 x3.(in(x1,x2) & rel(x2,x3) & n_skiing(x3) & n_midair(x2)) & n_man(x1))
exists p1 x1 x2 x3.((x1 = x2) & n_skiing(x2) & of(x2,x3) & n_man(x3))