A bearded man is playing a flute, and a person with dreads who is standing behind him plays another instrument.
a couple of men are playing instruments
A flute plus another instrument can be reworded as instruments.
exists e2 e3 e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_instrument(x6) & Theme(e3,x7) & Actor(e3,x3) & v_play(e3) & n_instrument(x7) & -(x7 = x6) & with(x3,x4) & behind(e2,x3) & n_male(x3) & Actor(e2,x5) & v_stand(e2) & (x4 = x5) & n_dread(x4) & n_person(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_flute(x2) & n_man(x1) & a_bearded(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x1,x2) & n_man(x2) & n_couple(x1))