Three teammates in action on a grass field.
There are three people on grass.
It's implied that a field is made of grass and teammates are people.
exists x1 x2 x3 x4.(a_topic(x1) & in(x1,x2) & on(x2,x3) & n_field(x3) & of(x3,x4) & n_grass(x4) & n_action(x2) & n_teammate(x1) & card_eq_3(x1))
exists p1 x1 x2 x3.((x1 = x2) & on(x2,x3) & n_grass(x3) & n_people(x2) & card_eq_3(x2))