A middle-aged man wearing a blue shirt is playing a saxophone.
The man is playing in front of an audience.
You can not infer there is an audience.
exists e1 e2 s1 s2 x1 x2 x3 x4.(Theme(e2,x4) & Actor(e2,x1) & v_play(e2) & n_saxophone(x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & n_shirt(x3) & a_blue(s2) & Theme(s2,x3) & (x1 = x2) & n_man(x1) & a_middle-aged(s1) & Theme(s1,x1))
exists e1 x1 x2 x3.(n_man(x1) & in(e1,x2) & of(x2,x3) & n_audience(x3) & n_front(x2) & Actor(e1,x1) & v_play(e1))