A couple is sitting on a park bench with balloons.
a couple is swimming in a pool
The couple sitting cannot be the ones swimming too.
exists e1 x1 x2 x3 x4.(with(e1,x4) & n_balloon(x4) & on(e1,x2) & n_bench(x2) & of(x2,x3) & n_park(x3) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))
exists e1 x1 x2.(in(e1,x2) & n_pool(x2) & Actor(e1,x1) & v_swim(e1) & n_couple(x1))