Four people walking through the snow together.
people were walking
Walking through the snow implies someone is walking.
exists e1 s1 x1 x2 x3.(n_snow(x3) & a_topic(x1) & a_together(s1) & Manner(e1,s1) & through(e1,x3) & Actor(e1,x2) & v_walk(e1) & (x1 = x2) & n_people(x1) & card_eq_4(x1))
exists e1 x1.(Actor(e1,x1) & v_walk(e1) & n_people(x1))