Two people working on an assembly line.
At a factory, there are two people hard at work.
The people may not be working hard, and they may not be at a factory.
exists e1 x1 x2 x3 x4.(a_topic(x1) & on(e1,x3) & n_line(x3) & of(x3,x4) & n_assembly(x4) & Actor(e1,x2) & v_work(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1 x2.(at(p1,x2) & n_factory(x2) & exists s1 x3 x4 x5.((x1 = x3) & at(s1,x5) & n_work(x5) & Theme(s1,x4) & a_hard(s1) & (x3 = x4) & n_people(x3) & card_eq_2(x3)))