A bunch of young girls are walking in the sand.
The young girls are swimming in a pool.
You cannot be walking in the sand if you are swimming.
exists e1 s1 x1 x2 x3.(n_sand(x3) & in(e1,x3) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_girl(x2) & a_young(s1) & Theme(s1,x2) & n_bunch(x1))
exists e1 s1 x1 x2.(n_girl(x1) & a_young(s1) & Theme(s1,x1) & in(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_swim(e1))