A group celebrates a marriage.
The group is attending a funeral.
Attending a funeral is a different activity than if one celebrates a marriage.
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_celebrate(e1) & n_marriage(x2) & n_group(x1))
exists e1 x1 x2.(n_group(x1) & Theme(e1,x2) & Actor(e1,x1) & v_attend(e1) & n_funeral(x2))