A man with a backpack and two children are on the beach.
People are on the beach.
A man and two children with a backpack are on the beach
exists p1 x1 x2 x3 x4.(n_beach(x4) & on(x1,x4) & with(x1,x2) & n_child(x2) & card_eq_2(x2) & of(x2,x3) & n_backpack(x3) & n_man(x1))
exists p1 x1 x2.(n_beach(x2) & on(x1,x2) & n_people(x1))