A boy with a blue Mohawk plays the violin.
A boy with a red Mohawk is playing a piano.
A red Mohawk is different from a blue Mohawk and a piano is different from a violin.
exists e1 s1 x1 x2 x3.(n_violin(x3) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & with(x1,x2) & ne_geo_mohawk(x2) & a_blue(s1) & Theme(s1,x2) & n_boy(x1))
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_piano(x3) & with(x1,x2) & n_mohawk(x2) & a_red(s1) & Theme(s1,x2) & n_boy(x1))