A woman rock climbing.
A woman is rock climbing.
Rock climbing is a paraphrase of is rock climbing.
exists e1 x1 x2 x3.(a_topic(x1) & Actor(e1,x3) & v_climb(e1) & (x1 = x3) & n_rock(x1) & of(x1,x2) & n_woman(x2))
exists p1 x1.(exists x2 x3.((x1 = x2) & n_climb(x2) & of(x2,x3) & n_rock(x3)) & n_woman(x1))