Group of people play music on stage together.
Musicians are doing their job.
Doing their job is more descriptive way of saying play music on stage together.
exists e1 s1 x1 x2 x3 x4.(ne_org_group(x1) & a_together(s1) & Manner(e1,s1) & on(e1,x4) & n_stage(x4) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_music(x3) & of(x1,x2) & n_people(x2))
exists e1 x1 x2.(n_job(x2) & of(x2,x1) & n_thing(x1) & ne_nam_musicians(x1) & Theme(e1,x2) & Actor(e1,x1) & v_do(e1))