A man is playing the accordion.
The man is in a band.
The man can play an instrument and not be in a band.
exists e1 x1 x2.(n_accordion(x2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))
exists p1 x1.(n_man(x1) & exists x2.(in(x1,x2) & n_band(x2)))