A native american indian playing a musical instrument on a stage.
A musician playing at a concert.
Just because a native american indian playing a musical instrument on a stage does not indicate that a musician playing at a concert.
exists e1 s1 s2 s3 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & on(x3,x4) & n_stage(x4) & n_instrument(x3) & a_musical(s3) & Theme(s3,x3) & (x1 = x2) & n_indian(x1) & a_american(s2) & Theme(s2,x1) & a_native(s1) & Theme(s1,x1))
exists s1 x1 x2.(a_topic(x1) & at(x1,x2) & n_concert(x2) & n_playing(x1) & a_musician(s1) & Theme(s1,x1))