Hipster performs on the acoustic guitar.
a musicians plays acoustic guitar
Not all hipsters are musicians.
exists e1 s1 x1 x2.(n_guitar(x2) & a_acoustic(s1) & Theme(s1,x2) & ne_nam_hipster(x1) & on(e1,x2) & Actor(e1,x1) & v_perform(e1))
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2) & a_acoustic(s1) & Theme(s1,x2) & n_musician(x1))