A group of people on a mountain trail.
Boy Scouts are hiking in the mountains.
The people are not necessarily Boy Scouts. The people are not necessarily hiking.
exists x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & on(x2,x3) & n_trail(x3) & of(x3,x4) & n_mountain(x4) & n_people(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_mountain(x3) & ne_nam_scouts(x1) & (x1 = x2) & ne_nam_boy(x2) & in(e1,x3) & Actor(e1,x1) & v_hike(e1))