People are taking pictures.
Some people are taking pictures of a rose garden.
Just because the people are taking pictures, it doesn't imply they are taking pictures of a rose garden.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_people(x1))
exists e2 e1 x1 x2 x3 x4.(Actor(e2,x3) & v_rise(e2) & of(x3,x4) & n_a(x4) & n_picture(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_garden(x2) & n_people(x1))