A man is sitting down making some pottery.
There is a man working.
Just because the man is making some pottery, it doesn't mean  he is working.
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 p1 x1 e1 x2 x3.((x1 = x2) & Actor(e1,x3) & v_work(e1) & (x2 = x3) & n_man(x2))