A group of orchestra musicians playing in a dim room.
A group of orchestra musicians were hired to play music for the event.
Not because the musicians are playing means they were hired.
exists e1 x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(e1,x5) & n_room(x5) & of(x5,x6) & n_dim(x6) & Actor(e1,x4) & v_play(e1) & (x1 = x4) & of(x1,x2) & n_musician(x2) & of(x2,x3) & n_orchestra(x3) & n_group(x1))
exists e1 p1 x1 x2 x3 x5.(n_event(x5) & Recipient(e1,p1) & Topic(e1,x1) & v_hire(e1) & exists e2 x4.(for(e2,x5) & Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & n_music(x4)) & of(x1,x2) & n_musician(x2) & of(x2,x3) & n_orchestra(x3) & n_group(x1))