An old man sits.
The man is tired.
An old man sitting does not imply that he is tired.
exists e1 s1 x1.(Actor(e1,x1) & v_sit(e1) & n_man(x1) & a_old(s1) & Theme(s1,x1))
exists s1 x1.(n_man(x1) & Theme(s1,x1) & a_tired(s1))