A woman is working with some kind of messy machinery at a party.
A woman at a party is using a machine.
One would have to be working with machinery in order to be using a machine.
exists e1 s1 x1 x2 x3 x4.(at(e1,x4) & n_party(x4) & with(e1,x2) & of(x2,x3) & n_machinery(x3) & a_messy(s1) & Theme(s1,x3) & n_kind(x2) & Actor(e1,x1) & v_work(e1) & n_woman(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_use(e1) & n_machine(x3) & at(x1,x2) & n_party(x2) & n_woman(x1))