A man in a blue shirt is running.
The man is sitting on the steps eating pizza.
running is contradictory to sitting
exists e1 s1 x1 x2.(Actor(e1,x1) & v_run(e1) & in(x1,x2) & n_shirt(x2) & a_blue(s1) & Theme(s1,x2) & n_man(x1))
exists e1 e2 x1 x2 x3 x4.(n_step(x2) & n_man(x1) & on(e1,x2) & Theme(e2,x4) & Actor(e2,x3) & v_eat(e2) & n_pizza(x4) & (x2 = x3) & Actor(e1,x1) & v_sit(e1))