A group of people have gathered to watch some girls sing.
There are girls performing for their families.
Watching girls sing does not imply performing for their families.
exists e1 p1 x1 x2.(Topic(e1,p1) & Actor(e1,x1) & v_gather(e1) & exists e3 e2 x3 x4.(Theme(e3,x3) & Actor(e3,x1) & v_watch(e3) & Actor(e2,x4) & v_sing(e2) & (x3 = x4) & n_girl(x3)) & of(x1,x2) & n_people(x2) & n_group(x1))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & for(e1,x4) & n_family(x4) & of(x4,x2) & n_thing(x2) & Actor(e1,x3) & v_perform(e1) & (x2 = x3) & n_girl(x2))