Two individuals are in a studio containing many buttons and different technologies.
An empty studio control room
The  studio isn't be empty if two people are in it.
exists p1 x1 x7.(n_technology(x7) & exists e1 x2 x3 x4 x5 x6.(in(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_contain(e1) & -(x6 = x7) & n_technology(x6) & n_buttons(x5) & subset_of(x6,x4) & subset_of(x5,x4) & n_quantity(x4) & (x2 = x3) & n_studio(x2)) & n_individual(x1) & card_eq_2(x1))
exists s1 x1 x2 x3.(a_topic(x1) & n_room(x1) & of(x1,x3) & n_control(x3) & of(x1,x2) & n_studio(x2) & a_empty(s1) & Theme(s1,x1))