A man in a hat plays an unusual instrument for cash next to the metro exit.
A man plays a theremin for money outside the metro station.
just because a man plays an unusual instrument for cash  doesn't imply he plays a theremin for money outside the metro station
exists e1 s1 x1 x2 x3 x4 x5 x6 x7.(n_exit(x6) & of(x6,x7) & n_metro(x7) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & to(x5,x6) & next(x3,x5) & n_thing(x5) & for(x3,x4) & n_cash(x4) & n_instrument(x3) & a_unusual(s1) & Theme(s1,x3) & in(x1,x2) & n_hat(x2) & n_man(x1))
exists e1 x1 x2 x3 x4 x5.(n_station(x4) & of(x4,x5) & n_metro(x5) & outside(e1,x4) & for(e1,x3) & n_money(x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_theremin(x2) & n_man(x1))