Musicians together in an orchestra.
The musicians are playing together.
Musicians in an orchestra implies playing together.
exists s1 x1 x2.(ne_nam_musicians(x1) & in(s1,x2) & n_orchestra(x2) & Theme(s1,x1) & a_together(s1))
exists e1 s1 x1.(n_musician(x1) & a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_play(e1))