A man without a shirt on is rock climbing.
A man is rock climbing.
man is rock climbing.is same as man is rock climbing.
exists p1 x1.(exists x4 x5.((x1 = x4) & n_climb(x4) & of(x4,x5) & n_rock(x5)) & -exists s1 x2 x3.(with(x1,x2) & Theme(s1,x3) & a_on(s1) & (x2 = x3) & n_shirt(x2)) & n_man(x1))
exists p1 x1.(exists x2 x3.((x1 = x2) & n_climb(x2) & of(x2,x3) & n_rock(x3)) & n_man(x1))