A family stands in the snowy woods.
The family is playing catch with a football in their backyard.
If family stands in woods, they're not playing catch in backyard.
exists e1 s1 x1 x2.(n_wood(x2) & a_snowy(s1) & Theme(s1,x2) & in(e1,x2) & Actor(e1,x1) & v_stand(e1) & n_family(x1))
exists e1 x1 x2 x3 x4.(n_backyard(x4) & of(x4,x1) & n_thing(x1) & n_family(x1) & in(e1,x4) & with(e1,x3) & n_football(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_catch(x2))