A bunch of people gathered around a long table.
The family waits for prayer before they dig in at the buffet.
A bunch of people gathering are not always a family.  A group can be gathered for many different purposes, they do not necessarily wait for prayer before they dig in at the buffet.  It cannot be assumed that because there are people around a long table that there is a buffet present.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & around(e1,x4) & n_table(x4) & a_long(s1) & Theme(s1,x4) & Theme(e1,x3) & v_gather(e1) & (x1 = x3) & of(x1,x2) & n_people(x2) & n_bunch(x1))
exists e1 p1 x1 x2 x3.(n_buffet(x3) & n_thing(x1) & n_family(x1) & exists e2 s1.(at(e2,x3) & a_in(s1) & Manner(e2,s1) & Actor(e2,x1) & v_dig(e2)) & before(e1,p1) & for(e1,x2) & n_prayer(x2) & Actor(e1,x1) & v_wait(e1))