People are taking pictures of something.
There is more than one person.
In order for there to be "people" there has to be more than one person.
exists e1 x1 x2 x3.(of(e1,x3) & n_thing(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & n_picture(x2) & n_people(x1))
exists p1 x1 s1 x2 x3.((x1 = x2) & than(s1,x3) & card_eq_1(x3) & Theme(s1,x2) & a_more(s1) & n_person(x2))