A man is chopping up a roast pig.
the man is using a knife
Chopping up implies using a knife.
exists e1 s1 x1 x2 x3.(a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_chop(e1) & n_pig(x2) & of(x2,x3) & n_roast(x3) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1) & n_knife(x2))