A man in a red shirt photographs nature.
the man is taking pictures.
Just because a man photographs nature doesn't mean he is taking pictures.
exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & n_nature(x2) & of(x2,x4) & n_photograph(x4) & of(x2,x3) & n_shirt(x3) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2))