Three people posing atop a mountain.
The three people are mountain climbers
The three people posing are not necessarily mountain climbers.
exists e1 x1 x2 x3.(a_topic(x1) & atop(e1,x3) & n_mountain(x3) & Actor(e1,x2) & v_pose(e1) & (x1 = x2) & n_people(x1) & card_eq_3(x1))
exists p1 x1.(n_people(x1) & card_eq_3(x1) & exists x2 x3.((x1 = x2) & n_climber(x2) & of(x2,x3) & n_mountain(x3)))