Two young boys, one with a tennis ball, play with a dog in a grassy field.
The children are with their pet outside.
if they are playing with a dog in a grassy field then they are with their pet  outside.
exists s1 s2 x1 x2 x3 x4 x5 x6 x7.(a_topic(x1) & rel(x1,x2) & rel(x2,x5) & in(x5,x7) & n_field(x7) & a_grassy(s2) & Theme(s2,x7) & with(x5,x6) & n_dog(x6) & n_play(x5) & with(x2,x3) & n_ball(x3) & of(x3,x4) & n_tennis(x4) & n_thing(x2) & card_eq_1(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & card_eq_2(x1))
exists p1 s1 x1 x2.(n_outside(x2) & a_pet(s1) & Theme(s1,x2) & of(x2,x1) & n_thing(x1) & n_child(x1) & with(x1,x2))