Two men are riding on a subway while reading books without wearing any pants.
Two people are topless, riding on a bus with some books.
One is not topless if one does not wear pants.
exists e2 e1 x1 x2 x3.(-all x4.(n_pants(x4) -> exists e3.(manner(e2,e3) & Theme(e3,x4) & Actor(e3,x1) & v_wear(e3))) & while(e1,e2) & Theme(e2,x3) & Actor(e2,x1) & v_read(e2) & n_book(x3) & on(e1,x2) & n_subway(x2) & Actor(e1,x1) & v_ride(e1) & n_man(x1) & card_eq_2(x1))
exists e1 s1 x1 x2 x3.(for(s1,e1) & on(e1,x2) & with(x2,x3) & n_book(x3) & n_bus(x2) & Actor(e1,x1) & v_ride(e1) & Theme(s1,x1) & a_topless(s1) & n_people(x1) & card_eq_2(x1))