A stoplight is yellow next to a pedestrian crossing sign.
This crosswalk has no light
yellow is contradictory to no light
exists e1 s1 x1 x2 x3.(to(s1,x2) & n_sign(x2) & Actor(e1,x2) & v_cross(e1) & of(x2,x3) & n_pedestrian(x3) & r_next(s1) & Theme(s1,x1) & a_yellow(s1) & n_stoplight(x1))
exists x1.(n_crosswalk(x1) & -exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_light(x2)))