A man sits in front of his laptop.
A man is playing a game on his laptop.
You can't imply the man is playing a game on the laptop.
exists e1 x1 x2 x3.(in(e1,x2) & of(x2,x3) & n_laptop(x3) & of(x3,x1) & n_male(x1) & n_front(x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & on(x2,x3) & n_laptop(x3) & of(x3,x1) & n_male(x1) & n_game(x2) & n_man(x1))