A group of people in a sack race.
A sack race with a group of people.
A group of people in a sack race and a sack race with a group of people have the same meanings.
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & in(x2,x3) & n_race(x3) & of(x3,x4) & n_sack(x4) & n_people(x2) & n_group(x1))
exists x1 x2 x3 x4.(a_topic(x1) & with(x1,x3) & of(x3,x4) & n_people(x4) & n_group(x3) & n_race(x1) & of(x1,x2) & n_sack(x2))