A skydiver flies through the air near a tall building.
A person is skydiving.
It's hard to imagine a context where a skydiver flies through the air at skyscraper height that wasn't the "person is skydiving"
exists e1 s1 x1 x2 x3.(n_air(x2) & through(e1,x2) & near(x2,x3) & n_building(x3) & a_tall(s1) & Theme(s1,x3) & Actor(e1,x1) & v_fly(e1) & n_skydiver(x1))
exists e1 x1.(Actor(e1,x1) & v_skydive(e1) & n_person(x1))