A girl in a pink rocker outfit singing with 3 other people playing guitar.
The people are a band.
A girl singing with others while playing a guitar implies that the people are in a band.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_people(x6) & a_topic(x1) & in(x1,x2) & with(e1,x5) & Theme(e2,x8) & Actor(e2,x7) & v_play(e2) & n_guitar(x8) & (x5 = x7) & -(x5 = x6) & n_people(x5) & n_date(x5) & a_date_day_03(x5) & a_date_day_03(x5) & Actor(e1,x4) & v_sing(e1) & (x2 = x4) & n_outfit(x2) & of(x2,x3) & n_rocker(x3) & a_pink(s1) & Theme(s1,x2) & n_girl(x1))
exists p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_band(x2)))