A man and woman repelling from a tall building.
The people are repelling into the cave.
Rappelling from a tall building means rappelling to the ground, not rappelling into a cave.
exists e1 s1 s2 x1 x2 x3 x4.(a_topic(s1) & from(e1,x4) & n_building(x4) & a_tall(s2) & Theme(s2,x4) & Actor(e1,x3) & v_repel(e1) & (s1 = x3) & n_woman(x2) & n_man(x1) & subset_of(x2,s1) & subset_of(x1,s1))
exists e1 x1 x2.(n_cave(x2) & n_people(x1) & into(e1,x2) & Actor(e1,x1) & v_repel(e1))