A chinese festival.
A festive event
A Chinese festival is a specific type of festive event.
exists s1 x1.(a_topic(x1) & n_festival(x1) & a_chinese(s1) & Theme(s1,x1))
exists s1 x1.(a_topic(x1) & n_event(x1) & a_festive(s1) & Theme(s1,x1))