Answer:
As I went over London Bridge I met my sister Jenny; I broke her neck and drank her blood and left her standing empty.
What jumps when it walks, but sits when it stands?
I am the home for feathery animals.
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I'm where yesterday follows today and tomorrow is in the middle. What am I?
What made Cyclops quit teaching?