A girl dances with adults in the sand.
A girl skates with adults on a lake.
You cannot be in sand and on the lake as those locations are not exactly the same.
exists e1 x1 x2 x3.(n_sand(x3) & with(e1,x2) & in(x2,x3) & n_adult(x2) & Actor(e1,x1) & v_dance(e1) & n_girl(x1))
exists e1 x1 x2 x3.(with(e1,x2) & on(x2,x3) & n_lake(x3) & n_adult(x2) & Actor(e1,x1) & v_skate(e1) & n_girl(x1))