A boy sits on a bus and sleeps, as a man walks past the window beside him on the outside.
A boy is on a bus.
is on a bus refers to sits.
exists e1 p1 x1 x2 x3 x4 x6 x7.(n_outside(x7) & n_window(x6) & exists e2 x5.(on(e2,x7) & past(e2,x6) & beside(x6,x1) & Actor(e2,x5) & v_walk(e2) & n_man(x5)) & n_male(x1) & as(e1,p1) & on(e1,x2) & subset_of(x4,x2) & n_sleep(x4) & subset_of(x3,x2) & n_bus(x3) & Actor(e1,x1) & v_sit(e1) & n_boy(x1))
exists p1 x1.(exists x2.(on(x1,x2) & n_bus(x2)) & n_boy(x1))