Two white men outside on a sunny day by a tree.
The men are on mars
There are no trees on Mars, so if the men are by a tree, they cannot be on Mars.
exists s1 s2 x1 x2 x3 x4.(a_topic(x1) & by(x1,x4) & n_tree(x4) & on(x2,x3) & n_day(x3) & a_sunny(s2) & Theme(s2,x3) & outside(x1,x2) & n_thing(x2) & n_man(x1) & a_white(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 x1.(n_man(x1) & exists x2.(on(x1,x2) & n_mar(x2)))