A mountain climber scales a steep rock face.
The mountain climber is swimming in a pool.
If one is swimming, one is not also scaling a rock.
exists e1 s1 x1 x2 x3 x4.(Theme(e1,x3) & Actor(e1,x1) & v_scale(e1) & n_face(x3) & of(x3,x4) & n_rock(x4) & a_steep(s1) & Theme(s1,x3) & n_climber(x1) & of(x1,x2) & n_mountain(x2))
exists e1 x1 x2 x3.(n_climber(x1) & of(x1,x2) & n_mountain(x2) & in(e1,x3) & n_pool(x3) & Actor(e1,x1) & v_swim(e1))