Two people are riding bikes in front of a vast mountain range.
The people are outdoors.
Vast mountain range implies outdoors.
exists e1 s1 x1 x2 x3 x4 x5.(in(e1,x3) & of(x3,x4) & n_range(x4) & of(x4,x5) & n_mountain(x5) & a_vast(s1) & Theme(s1,x4) & n_front(x3) & Theme(e1,x2) & Actor(e1,x1) & v_ride(e1) & n_bike(x2) & n_people(x1) & card_eq_2(x1))
exists p1 x1.(n_people(x1) & exists x2.((x1 = x2) & n_outdoors(x2)))