Two children read in bed.
A couple of children are reading.
This tells us that two is also a couple.
exists e1 x1 x2.(in(e1,x2) & n_bed(x2) & Theme(e1,x1) & v_read(e1) & n_child(x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_read(e1) & n_thing(x3) & of(x1,x2) & n_child(x2) & n_couple(x1))