a small family at a wedding.
a wedding is underway
The family is at a wedding that is underway.
exists s1 x1 x2.(a_topic(x1) & at(x1,x2) & n_wedding(x2) & n_family(x1) & a_small(s1) & Theme(s1,x1))
exists s1 x1.(Theme(s1,x1) & a_underway(s1) & n_wedding(x1))