A group of people in black and white walk past two black and white striped sign posts on a city street corner.
Nobody is walking
There cannot be a group of people and nobody at the same time
exists s1 s2 s3 s4 s5 x1 x2 x3 x4 x5 x6 x7 x8 x9.(a_topic(x1) & n_street(x1) & Time(x1,x9) & n_corner(x9) & past(x1,x6) & on(x6,x8) & n_city(x8) & n_post(x6) & of(x6,x7) & n_sign(x7) & a_striped(s5) & Theme(s5,x6) & a_white(s4) & Theme(s4,x6) & a_black(s3) & Theme(s3,x6) & card_eq_2(x6) & of(x1,x2) & subset_of(x5,x2) & n_walk(x5) & a_white(s2) & Theme(s2,x5) & subset_of(x3,x2) & Theme(s1,x4) & a_black(s1) & (x3 = x4) & n_people(x3) & n_group(x1))
-exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_person(x1))