A person is playing a drum.
A person is playing a drum in a band.
Playing a drum does not imply playing a drum in a band.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_drum(x2) & n_person(x1))
exists e1 x1 x2 x3.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & in(x2,x3) & n_band(x3) & n_drum(x2) & n_person(x1))