A jewish gathering of people such as dinner or prayer.
The jewish people were celebrating someone's bar mitzvah
Jewish people aren't necessarily celebrating a bar mitzvah.
exists s1 x1 x2 x3.(a_topic(x1) & of(x1,x2) & n_such(x2) & as(x2,x3) & (n_dinner(x3) | n_prayer(x3)) & n_people(x2) & n_gathering(x1) & a_jewish(s1) & Theme(s1,x1))
exists e1 s1 x1 x2 x3 x4.(n_people(x1) & a_jewish(s1) & Theme(s1,x1) & Theme(e1,x3) & Actor(e1,x1) & v_celebrate(e1) & n_mitzvah(x3) & of(x3,x4) & n_bar(x4) & of(x3,x2) & n_person(x2))