A girl dances with adults in the sand.
A girl rides a bike.
You cannot be dancing while riding a bike it would be impossible.
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.(Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_girl(x1))