People watch a musician play the guitar.
A musician is playing out of tune.
One can play the guitar without playing out of tune.
exists e1 s1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_watch(e1) & n_guitar(x3) & (x2 = x3) & n_play(x2) & a_musician(s1) & Theme(s1,x2) & n_people(x1))
exists e1 x1 x2.(of(e1,x2) & n_tune(x2) & r_out(e1) & Actor(e1,x1) & v_play(e1) & n_musician(x1))