Two people working on an assembly line.
Two people assemble cars.
The people may not be assembling cars.
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 s1 x1 x2 x3.(a_topic(x1) & Theme(s1,x3) & Actor(s1,x2) & a_assemble(s1) & n_car(x3) & (x1 = x2) & n_people(x1) & card_eq_2(x1))