Several people are on a shoreline that has a sign behind them.
The people are all members of the same family.
The people aren't necessarily members of the same family.
exists p1 s1 x1.(exists e1 x2 x3 x4.(on(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & behind(x4,x1) & n_sign(x4) & (x2 = x3) & n_shoreline(x2)) & n_thing(x1) & n_people(x1) & a_several(s1) & Theme(s1,x1))
exists p1 s1 x1 x3.(n_family(x3) & a_same(s1) & Theme(s1,x3) & n_people(x1) & all x2.(n_member(x2) -> ((x1 = x2) & of(x2,x3))))