A crowd of people in a parade.
A group of performer are walking together in a parade line.
Just because there is a crowd of people in a parade does not mean it is a group of performer.
exists x1 x2 x3.(a_topic(x1) & in(x1,x3) & n_parade(x3) & of(x1,x2) & n_people(x2) & n_crowd(x1))
exists e1 s1 x1 x2 x3 x4.(in(e1,x3) & n_line(x3) & of(x3,x4) & n_parade(x4) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_walk(e1) & of(x1,x2) & n_performer(x2) & n_group(x1))