The four older adults in the room are talking to each other.
A group of parents talking in the house.
There is no evidence that the adults talking are parents, they may not have children.  They may not be in a house.  They could be in an office building, or school.
exists e1 s1 x1 x2.(n_room(x2) & n_adult(x1) & r_more(s1) & a_older(s1) & Theme(s1,x1) & card_eq_4(x1) & all x3.(n_other(x3) -> to(e1,x3)) & Actor(e1,x1) & v_talk(e1) & in(x1,x2))
exists e1 x1 x2 x3 x4.(n_house(x4) & a_topic(x1) & in(e1,x4) & Actor(e1,x3) & v_talk(e1) & (x1 = x3) & of(x1,x2) & n_parent(x2) & n_group(x1))