A man and two children in life jackets in a boat on a lake.
There are three people on a boat.
A man and two children are actually three people in a boat.
exists x1 x2 x3 x4 x5 x6.(a_topic(x1) & in(x1,x3) & in(x3,x5) & on(x5,x6) & n_lake(x6) & n_boat(x5) & n_jacket(x3) & of(x3,x4) & n_life(x4) & n_child(x1) & card_eq_2(x1) & of(x1,x2) & n_man(x2))
exists p1 x1 x2 x3.((x1 = x2) & on(x2,x3) & n_boat(x3) & n_people(x2) & card_eq_3(x2))