A Chinese man sitting in a park.
There is one man in the picture.
The word A implies that there is only one man and there is one man in the picture.
exists e1 s1 x1 x2 x3.(a_topic(x1) & in(e1,x3) & n_park(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_man(x1) & a_chinese(s1) & Theme(s1,x1))
exists p1 x1 x3.(n_picture(x3) & exists x2.((x1 = x2) & in(x2,x3) & n_man(x2) & card_eq_1(x2)))