A boy and a girl are standing on the edge of a lake at sunset.
The girls are playing.
The people can ether be a boy and girl or all girls.
exists e1 x1 x2 x3 x4 x5 x6.(n_edge(x4) & at(e1,x6) & n_sunset(x6) & on(e1,x4) & of(x4,x5) & n_lake(x5) & Actor(e1,x1) & v_stand(e1) & subset_of(x3,x1) & n_girl(x3) & subset_of(x2,x1) & n_boy(x2))
exists e1 x1.(n_girl(x1) & Actor(e1,x1) & v_play(e1))