A man is playing the flute and there is another instrumentalist behind him.
The area is quiet around the man.
Playing an instrument, implies it is not quiet.
exists e1 p1 x1 x2 x3 x4.(n_male(x2) & n_instrumentalist(x4) & n_flute(x2) & exists x5.((x3 = x5) & behind(x5,x2) & n_instrumentalist(x5) & -(x5 = x4)) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))
exists s1 x1 x2.(n_man(x2) & n_area(x1) & around(s1,x2) & Theme(s1,x1) & a_quiet(s1))