Two people street cleaning by hand and with machine.
The people are sleeping.
One cannot be cleaning and sleeping simultaneously.
exists x1 x2 x3 x4 x5 x6.(a_topic(x5) & with(x5,x6) & n_machine(x6) & n_people(x5) & card_eq_2(x5) & a_topic(x3) & n_street(x3) & Time(x3,x4) & n_cleaning(x4) & n_people(x3) & card_eq_2(x3) & by(x2,x1) & n_people(x2) & card_eq_2(x2) & n_hand(x1))
exists e1 x1.(n_people(x1) & Actor(e1,x1) & v_sleep(e1))