People taking pictures of an object.
people taking photographs.
Taking pictures is a paraphrasing of taking photographs.
exists e1 x1 x2 x3 x4.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & of(x3,x4) & n_object(x4) & n_picture(x3) & (x1 = x2) & n_people(x1))
exists e1 x1 x2 x3.(a_topic(x1) & Theme(e1,x3) & Actor(e1,x2) & v_take(e1) & n_photograph(x3) & (x1 = x2) & n_people(x1))