Q: We went to the lake , because a shark had been seen at the ocean beach , so *it* was a safer place to swim.
Are "the lake" and "it" the same?
=======
A: yes


Q: I asked Dave to get me my sweater from the other side of the yacht . While he was gone, I rested my arm on the rail over there and suddenly *it* gave way.
Are "rail" and "it" the same?
=======
A: yes


Q: Anne gave birth to a daughter last month. *She* is a very charming baby.
Are "Anne" and "She" the same?
=======
A:
no