Two people hike up a snowy hill.
Two people hiking.
The people may not be hiking which usually denote a longer trip. They could just be on a hike which can mean a shorter walk.
exists e1 s1 s2 x1 x2.(a_up(s2) & Manner(e1,s2) & Theme(e1,x2) & Actor(e1,x1) & v_hike(e1) & n_hill(x2) & a_snowy(s1) & Theme(s1,x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(a_topic(x1) & Actor(e1,x2) & v_hike(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))