Two people working on an assembly line.
People are relaxing in front of a conveyor belt.
One cannot be working and relaxing.
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 e1 x1 x2 x3 x4.(in(e1,x2) & of(x2,x3) & n_belt(x3) & of(x3,x4) & n_conveyor(x4) & n_front(x2) & Actor(e1,x1) & v_relax(e1) & n_people(x1))