The stop sign is folded up against the side of the bus.
There's a stop sign on the bus.
In order for the stop sign to be folded up against the bus, there must be a stop sign on the bus.
exists e1 s1 x1 x2 x3 x4.(n_bus(x4) & n_side(x3) & n_sign(x1) & of(x1,x2) & n_stop(x2) & a_up(s1) & Manner(e1,s1) & against(e1,x3) & of(x3,x4) & Theme(e1,x1) & v_fold(e1))
exists p1 x1 x2.(n_bus(x2) & on(p1,x2) & exists x3 x4.((x1 = x3) & n_sign(x3) & of(x3,x4) & n_stop(x4)))