A girl jumps in the grass.
a girl is training for a track meet
Just because there is a girl jumping in the grass does not infer that she is training for a track meet.
exists e1 x1 x2.(n_grass(x2) & in(e1,x2) & Actor(e1,x1) & v_jump(e1) & n_girl(x1))
exists e1 e2 x1 x2 x3.(Actor(e2,x1) & v_meet(e2) & for(e1,x3) & n_track(x3) & Actor(e1,x2) & v_train(e1) & (x1 = x2) & n_girl(x1))