Musicians sitting at a table inside, playing classical instruments.
Musicians play instruments.
in a both sentence  musicians are play.
exists e1 e2 s1 x1 x2 x3 x4.(ne_nam_musicians(x1) & Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & n_instrument(x4) & a_classical(s1) & Theme(s1,x4) & at(e1,x2) & n_inside(x2) & of(x2,x3) & n_table(x3) & Actor(e1,x1) & v_sit(e1))
exists e1 x1 x2.(ne_nam_musicians(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2))