A man and a woman, both wearing hiking gear, are standing on the edge of a large canyon.
Two people are standing outside.
Just because people are standing at the edge of a large canyon does not mean that they have to be standing outside.  They could be standing inside some type of structure.
exists e1 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8 x9.(n_edge(x8) & on(e2,x8) & of(x8,x9) & n_canyon(x9) & a_large(s1) & Theme(s1,x9) & Actor(e2,x1) & v_stand(e2) & subset_of(x3,x1) & rel(x3,x4) & Theme(e1,x6) & Actor(e1,x5) & v_wear(e1) & n_gear(x6) & of(x6,x7) & n_hiking(x7) & (x4 = x5) & n_thing(x4) & n_woman(x3) & subset_of(x2,x1) & n_man(x2))
exists e1 s1 x1.(a_outside(s1) & Manner(e1,s1) & Actor(e1,x1) & v_stand(e1) & n_people(x1) & card_eq_2(x1))