Two men sit on a couch and talk.
Two men are talking while sitting on a couch.
men are talking while sitting can also be said as men sit and talk
exists e1 x1 x2 x3 x4.(on(e1,x2) & n_talk(x4) & n_couch(x3) & subset_of(x4,x2) & subset_of(x3,x2) & Actor(e1,x1) & v_sit(e1) & n_man(x1) & card_eq_2(x1))
exists e2 e1 x1 x2.(while(e1,e2) & on(e2,x2) & n_couch(x2) & Actor(e2,x1) & v_sit(e2) & Actor(e1,x1) & v_talk(e1) & n_man(x1) & card_eq_2(x1))