A group of woman in red shirts are singing.
Some women who are wearing red shirts are singing.
Some women who are wearing red shirts is a rephrase of a group of women in red shirts.
exists e1 s1 x1 x2 x3.(Actor(e1,x1) & v_sing(e1) & of(x1,x2) & in(x2,x3) & n_shirt(x3) & a_red(s1) & Theme(s1,x3) & n_woman(x2) & n_group(x1))
exists e1 e2 s1 x1 x2 x3.(Actor(e2,x1) & v_sing(e2) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_red(s1) & Theme(s1,x3) & (x1 = x2) & n_woman(x1))