A group of string musicians collect money by playing on the street while people listen.
There are people singing outdoors
String musicians cannot simultaneously be playing and singing.
exists e2 e1 p1 x1 x2 x3 x4 x5.(n_street(x5) & by(e1,e2) & exists e3 x6.(Actor(e3,x6) & v_listen(e3) & n_people(x6)) & while(e2,p1) & on(e2,x5) & Actor(e2,x1) & v_play(e2) & Theme(e1,x4) & Actor(e1,x1) & v_collect(e1) & n_money(x4) & of(x1,x2) & n_musician(x2) & of(x2,x3) & n_string(x3) & n_group(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_sing(e1) & n_outdoors(x4) & (x2 = x3) & n_people(x2))