A bunch of people are dancing and celebrating.
They are celebrating their wedding.
Not all celebrating is related to a wedding.
exists e1 e2 x1 x2 x3 x4.(Actor(e2,x3) & v_celebrate(e2) & of(x3,x4) & n_people(x4) & n_bunch(x3) & Actor(e1,x1) & v_dance(e1) & of(x1,x2) & n_people(x2) & n_bunch(x1))
exists e1 x1 x2.(n_wedding(x2) & of(x2,x1) & n_thing(x1) & n_thing(x1) & Theme(e1,x2) & Actor(e1,x1) & v_celebrate(e1))