Two people hiking on a trail.
Two people are swimming in the ocean.
Hiking on a trail and swimming in the ocean are different settings and activities.
exists e1 x1 x2 x3.(a_topic(x1) & on(e1,x3) & n_trail(x3) & Actor(e1,x2) & v_hike(e1) & (x1 = x2) & n_people(x1) & card_eq_2(x1))
exists e1 x1 x2.(n_ocean(x2) & in(e1,x2) & Actor(e1,x1) & v_swim(e1) & n_people(x1) & card_eq_2(x1))