Four men are walking up a trail.
A group of friends go for a hike.
The men might not be a group of friends, and they might be walking on a trail without going for a hike.
exists e1 s1 x1 x2.(a_up(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_walk(e1) & n_trail(x2) & n_man(x1) & card_eq_4(x1))
exists e1 x1 x2 x3.(for(e1,x3) & n_hike(x3) & Actor(e1,x1) & v_go(e1) & of(x1,x2) & n_friend(x2) & n_group(x1))