three riders stand around their horses in the mountains.
The riders are waiting with their horses for a race to begin.
Standing around horses does not imply waiting for a race.
exists e1 x1 x2 x3.(n_mountain(x3) & around(e1,x2) & in(x2,x3) & n_horse(x2) & of(x2,x1) & n_thing(x1) & Actor(e1,x1) & v_stand(e1) & n_rider(x1) & card_eq_3(x1))
exists e1 p1 x1 x2 x3.(n_horse(x2) & of(x2,x1) & n_thing(x1) & n_rider(x1) & with(e1,x2) & for(x2,x3) & Topic(x3,p1) & exists e2 x4.(Theme(e2,x4) & Actor(e2,x3) & v_begin(e2) & n_thing(x4)) & n_race(x3) & Actor(e1,x1) & v_wait(e1))