A man is sitting down making some pottery.
An expert is making some beautiful pots
Just because the man is making some pottery, it doesn't mean he is an expert at it.
exists e1 e2 s1 x1 x2.(for(e1,e2) & Theme(e2,x2) & Actor(e2,x1) & v_make(e2) & n_pottery(x2) & a_down(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_man(x1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_make(e1) & n_pot(x2) & a_beautiful(s1) & Theme(s1,x2) & n_expert(x1))