Problem: There is a pillar between me and the stage , and I can't see *it* .

Do "it" and "the stage" mean the same thing?

Answer: yes


Problem: The older students were bullying the younger ones, so we rescued *them* .

Do "them" and "The older students" mean the same thing?

Answer: no


Problem: In the storm, the tree fell down and crashed through the roof of my house. Now, I have to get *it* removed.

Do "it" and "the roof" mean the same thing?

Answer:
no