Several people on a beach, and a ball.
The rock climbers rest before continuing their ascent.
Climbers can't continue an ascent if they've not begun an ascent, and being on a beach puts you at sea level, so you can't have begun your ascent.
exists s1 x1 x2 x3 x4.(a_topic(x1) & on(x1,x2) & subset_of(x4,x2) & n_ball(x4) & subset_of(x3,x2) & n_beach(x3) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists e2 e1 x1 x2 x3.(n_ascent(x3) & of(x3,x1) & n_thing(x1) & n_rock(x1) & before(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_continue(e2) & Theme(e1,x2) & Actor(e1,x1) & v_climber(e1) & n_rest(x2))