A group of people walk down the street waving rainbow flags.
A gay pride parade is in progress.
Not all people walking down the street are in a gay pride parade.
exists e2 e1 x1 x2 x3 x4 x5 x6.(n_street(x3) & down(e1,x3) & Theme(e2,x5) & Actor(e2,x4) & v_wave(e2) & n_flag(x5) & of(x5,x6) & n_rainbow(x6) & (x3 = x4) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 s1 x1 x2.(exists x3.(in(x1,x3) & n_progress(x3)) & n_parade(x1) & of(x1,x2) & n_pride(x2) & a_gay(s1) & Theme(s1,x1))