Problem: We saw a boy trying to leap a pony over a gate; the pony would not take the leap, and the boy cut him with the whip, but *he* only turned to one side.
Are "he" and "pony" the same?
****
Answer: yes

Problem: Bob collapsed on the sidewalk. Soon he saw Carl coming to help. *He* was very ill.
Are "He" and "Bob" the same?
****
Answer: yes

Problem: We went to the lake , because a shark had been seen at the ocean beach , so *it* was a dangerous place to swim.
Are "it" and "the lake" the same?
****
Answer:
no