Four people walk down a city sidewalk- three facing the camera one away.
A camera is about to take a picture.
Facing the camera does not necessarily mean about to take a picture.
exists e1 e2 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7.(n_camera(x6) & Time(e2,x7) & card_eq_1(x7) & a_away(s3) & Manner(e2,s3) & a_down(s2) & Manner(e2,s2) & Theme(e2,x2) & Actor(e2,x1) & v_walk(e2) & Theme(s1,x4) & Actor(s1,x3) & a_sidewalk-(s1) & Theme(e1,x6) & Actor(e1,x5) & v_face(e1) & (x4 = x5) & n_thing(x4) & card_eq_3(x4) & (x2 = x3) & n_city(x2) & n_people(x1) & card_eq_4(x1))
exists p1 s1 x1.(Topic(s1,p1) & Actor(s1,x1) & a_about(s1) & exists e1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2)) & n_camera(x1))