A group of people dressed in plaid are playing music.
A group of people are playing music.
playing music means the people do just that.
exists e1 e2 x1 x2 x3 x4 x5.(Theme(e2,x5) & Actor(e2,x1) & v_play(e2) & n_music(x5) & of(x1,x2) & in(e1,x4) & n_plaid(x4) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_music(x3) & of(x1,x2) & n_people(x2) & n_group(x1))