A group of people are dressed in multicolored clothes while performing an act.
a group of people dressed in multicolored clothes perform an act in front of an audience
In the first sentence, they could be performing the act in a rehearsal or practice, so we do not know that they are in front of an audience.
exists e1 e2 s1 x1 x2 x3 x4.(while(e1,e2) & Theme(e2,x4) & Actor(e2,x1) & v_perform(e2) & n_act(x4) & in(e1,x3) & n_clothes(x3) & a_multicolored(s1) & Theme(s1,x3) & Theme(e1,x1) & v_dress(e1) & of(x1,x2) & n_people(x2) & n_group(x1))
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7.(in(e2,x6) & of(x6,x7) & n_audience(x7) & n_front(x6) & Theme(e2,x5) & Actor(e2,x1) & v_perform(e2) & n_act(x5) & of(x1,x2) & in(e1,x4) & n_clothes(x4) & a_multicolored(s1) & Theme(s1,x4) & Theme(e1,x3) & v_dress(e1) & (x2 = x3) & n_people(x2) & n_group(x1))