People are sitting outside on a deck at tables.
People on the deck are having a party.
Just because people are sitting outside on a deck does not mean they are having a party.
exists e1 s1 x1 x2 x3.(at(e1,x3) & n_table(x3) & on(e1,x2) & n_deck(x2) & a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_people(x1))
exists e1 x1 x2 x3.(n_deck(x2) & Theme(e1,x3) & Actor(e1,x1) & v_have(e1) & n_party(x3) & on(x1,x2) & n_people(x1))