The stop sign is folded up against the side of the bus.
The stop sign is off.
Just because the stop sign is on the side of the bus doesn't mean that it is off.
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 s1 x1 x2.(n_sign(x1) & of(x1,x2) & n_stop(x2) & Theme(s1,x1) & a_off(s1))