A dozen people at a house party in a living room decorated with a British flag.
They are celebrating the new Royal addition the royal family
The fact that a dozen people at a house party in a living room decorated with a British flag doesn't imply that they are celebrating the new Royal addition to the royal family.
exists e1 s1 x1 x2 x3 x4 x5 x6 x7 x8.(a_topic(x1) & in(x1,x5) & with(e1,x8) & n_flag(x8) & a_british(s1) & Theme(s1,x8) & Theme(e1,x7) & v_decorate(e1) & (x5 = x7) & n_room(x5) & of(x5,x6) & n_living(x6) & at(x1,x3) & n_party(x3) & of(x3,x4) & n_house(x4) & n_people(x1) & of(x1,x2) & n_dozen(x2))
exists e1 s1 x1 x2 x3 x4.(n_addition(x2) & (x2 = x3) & ne_geo_royal(x3) & a_new(s1) & Theme(s1,x2) & Theme(e1,x2) & Actor(e1,x1) & v_celebrate(e1) & n_family(x1) & of(x1,x4) & n_royal(x4) & (x2 = x1) & n_thing(x1))