A crowd of people waiting for the light.
The light is red while the people wait.
A red light means that people need to be waiting for the light.
exists e1 x1 x2 x3 x4.(n_light(x4) & a_topic(x1) & of(x1,x2) & for(e1,x4) & Actor(e1,x3) & v_wait(e1) & (x2 = x3) & n_people(x2) & n_crowd(x1))
exists e1 s1 x1 x2 x3.(n_people(x3) & n_light(x1) & Actor(e1,x1) & v_wait(e1) & while(s1,x3) & Theme(s1,x2) & a_red(s1) & (x1 = x2))