One man is sitting on top of a school bus, while another man, wearing a matching shirt, is standing inside.
Two men are on the bus.
The second sentence says that two men are in the bus instead of one inside and one on top.
exists e1 p1 x1 x2 x3 x4.(exists e3 e2 s1 s2 x5 x6 x7.(a_inside(s2) & Manner(e3,s2) & Actor(e3,x5) & v_stand(e3) & Theme(e2,x7) & Actor(e2,x6) & v_wear(e2) & n_shirt(x7) & a_matching(s1) & Theme(s1,x7) & (x5 = x6) & n_man(x5) & -(x5 = x1)) & n_man(x1) & n_man(x1) & while(e1,p1) & on(e1,x2) & of(x2,x3) & n_bus(x3) & of(x3,x4) & n_school(x4) & n_top(x2) & Actor(e1,x1) & v_sit(e1) & card_eq_1(x1))
exists p1 x1 x2.(n_bus(x2) & on(x1,x2) & n_man(x1) & card_eq_2(x1))