Two men sit at work computers and work at night.
Two men at work.
men sit at work computers and work at night implies that  men at work.
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.(a_topic(x1) & at(x1,x2) & n_work(x2) & n_man(x1) & card_eq_2(x1))