A man with a guitar playing in front of a group of girls wearing hats.
A man is teaching guitar to girls.
A man playing guitar isn't necessarily teaching guitar to girls.
exists e1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & with(x1,x2) & in(x2,x4) & of(x4,x5) & Theme(e1,x8) & Actor(e1,x7) & v_wear(e1) & n_hat(x8) & (x5 = x7) & of(x5,x6) & n_girl(x6) & n_group(x5) & n_front(x4) & n_playing(x2) & of(x2,x3) & n_guitar(x3) & n_man(x1))
exists e1 x1 x2 x3.(to(e1,x3) & n_girl(x3) & Theme(e1,x2) & Actor(e1,x1) & v_teach(e1) & n_guitar(x2) & n_man(x1))