A man in a costume entertains four kids.
The four kids at the party were entertained by the costumed man.
Entertaining four kids does not imply being at a party.
exists e1 x1 x2 x3.(Theme(e1,x3) & Actor(e1,x1) & v_entertain(e1) & n_kid(x3) & card_eq_4(x3) & in(x1,x2) & n_costume(x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_man(x3) & a_costumed(s1) & Theme(s1,x3) & n_party(x2) & n_kid(x1) & card_eq_4(x1) & Actor(e1,x3) & Theme(e1,x1) & v_entertain(e1) & at(x1,x2))