Three people are in the snow.
It is winter.
Just because people are in the snow doesn't imply it is winter.
exists p1 x1 x2.(n_snow(x2) & in(x1,x2) & n_people(x1) & card_eq_3(x1))
exists p1 x1.(n_thing(x1) & exists x2.((x1 = x2) & n_winter(x2)))