Male musicians are playing a gig with one on the drums and the other on the guitar, with a backdrop of purple graphics apart of the light show.
Some people are performing.
Male musicians  refers to some people.
exists e1 s1 s2 s3 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11.(n_show(x11) & a_light(s3) & Theme(s3,x11) & n_guitar(x7) & n_other(x6) & n_drum(x5) & with(e1,x8) & of(x8,x9) & of(x10,x11) & apart(x9,x10) & n_thing(x10) & n_graphic(x9) & a_purple(s2) & Theme(s2,x9) & n_backdrop(x8) & on(e1,x7) & with(e1,x3) & subset_of(x6,x3) & subset_of(x4,x3) & on(x4,x5) & n_thing(x4) & card_eq_1(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_gig(x2) & n_musician(x1) & a_male(s1) & Theme(s1,x1))
exists e1 x1.(Actor(e1,x1) & v_perform(e1) & n_people(x1))