people raise their phones in a nightclub while listening to a band.
People are watching a band perform.
Listening to a band and watching a band perform could mean the same thing.
exists e1 e2 x1 x2 x3 x4.(while(e1,e2) & to(e2,x4) & n_band(x4) & Actor(e2,x1) & v_listen(e2) & in(e1,x3) & n_nightclub(x3) & Theme(e1,x2) & Actor(e1,x1) & v_raise(e1) & n_phone(x2) & of(x2,x1) & n_thing(x1) & n_people(x1))
exists e1 e2 x1 x2 x3.(Actor(e2,x1) & v_perform(e2) & Theme(e1,x3) & Actor(e1,x2) & v_watch(e1) & n_band(x3) & (x1 = x2) & n_people(x1))