A man photographing tulips.
A man takes pictures at the botanical gardens.
Just because a man is photographing tulips doesn't imply he is at the botanical gardens.
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_photograph(e1) & n_tulip(x3) & (x1 = x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_garden(x3) & a_botanical(s1) & Theme(s1,x3) & at(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_man(x1))