Man with an orange shirt is grinding on stone, he is not wearing shoes.
A man with no pants or shoes is grinding on stone.
If a man is in an orange shirt and no  shoes, it doesn't imply he does not have his pants on.
exists e1 x1 x2 x3 x4.(-exists e2 x5.(Theme(e2,x5) & Actor(e2,x1) & v_wear(e2) & n_shoe(x5)) & n_male(x1) & on(e1,x4) & n_stone(x4) & Actor(e1,x1) & v_grind(e1) & with(x1,x2) & n_shirt(x2) & of(x2,x3) & n_orange(x3) & n_man(x1))
exists x1.(-exists e1 x2 x3.(on(e1,x3) & n_stone(x3) & Actor(e1,x1) & v_grind(e1) & with(x1,x2) & (n_pants(x2) | n_shoe(x2))) & n_man(x1))