A man in a white shirt is playing a flute.
The man is a well known flute player.
The man might not be known.
exists e1 s1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_flute(x3) & in(x1,x2) & n_shirt(x2) & a_white(s1) & Theme(s1,x2) & n_man(x1))
exists p1 x1.(n_man(x1) & exists e1 x2 x3.((x1 = x2) & n_player(x2) & of(x2,x3) & n_flute(x3) & Theme(e1,x2) & v_know(e1) & r_well(x2)))