Two men sit at work computers and work at night.
Two women at work on the phone.
There can be either two men or two women
exists e1 x1 x2 x3 x4 x5 x6.(at(e1,x6) & n_night(x6) & at(e1,x2) & subset_of(x5,x2) & n_work(x5) & subset_of(x3,x2) & n_computer(x3) & of(x3,x4) & n_work(x4) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists x1 x2 x3.(n_phone(x3) & a_topic(x1) & at(x1,x2) & on(x2,x3) & n_work(x2) & n_woman(x1) & card_eq_2(x1))