A rock climber hangs from a cliff in the mountains.
The rock climber is using a harness.
Just because a rock climber hangs from a cliff in the mountains, does not mean he is using a harness.
exists e1 x1 x2 x3 x4.(n_mountain(x4) & from(e1,x3) & in(x3,x4) & n_cliff(x3) & Actor(e1,x1) & v_hang(e1) & n_climber(x1) & of(x1,x2) & n_rock(x2))
exists e1 x1 x2 x3.(n_climber(x1) & of(x1,x2) & n_rock(x2) & Theme(e1,x3) & Actor(e1,x1) & v_use(e1) & n_harness(x3))