A man on his hands and knees outside in the grass.
A pig is in the pigpen.
A man is not a pig.
exists s1 x1 x2 x3 x4 x5.(n_grass(x5) & a_topic(s1) & subset_of(x3,s1) & in(x4,x5) & outside(x3,x4) & n_thing(x4) & n_knee(x3) & subset_of(x1,s1) & on(x1,x2) & n_hand(x2) & of(x2,x1) & n_male(x1) & n_man(x1))
exists p1 x1 x2.(n_pigpen(x2) & in(x1,x2) & n_pig(x1))