A line of cheerleaders in blue costumes wait to perform.
A group of cheerleaders in blue are waiting.
Answer: The group refers to line of cheerleaders.
exists e1 p1 s1 x1 x2 x3.(Topic(e1,p1) & Actor(e1,x1) & v_wait(e1) & exists e2.(Actor(e2,x1) & v_perform(e2)) & of(x1,x2) & in(x2,x3) & n_costume(x3) & a_blue(s1) & Theme(s1,x3) & n_cheerleader(x2) & n_line(x1))
exists e1 x1 x2 x3.(Actor(e1,x1) & v_wait(e1) & in(x1,x3) & n_blue(x3) & of(x1,x2) & n_cheerleader(x2) & n_group(x1))