Girl playing acoustic guitar on homemade milk crate stage.
A boy is playing on the drums.
Two contradictions, one is the boy as against Girl and second is boy playing drums against girl playing guitar.
exists e1 s1 x1 x2 x3 x4 x5 x6.(ne_nam_girl(x1) & on(e1,x3) & n_stage(x3) & of(x3,x6) & n_crate(x6) & of(x3,x5) & n_milk(x5) & of(x3,x4) & n_homemade(x4) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & a_acoustic(s1) & Theme(s1,x2))
exists e1 x1 x2.(n_drum(x2) & on(e1,x2) & Actor(e1,x1) & v_play(e1) & n_boy(x1))