Question:
Steve scratched Johnny so he became angry.

Who is he referring to in this sentence?
---
Answer:
Johnny

Question:
John visited his son so he would feel loved.

Who is he referring to in this sentence?
---
Answer:
his son

Question:
The salesman sold a hot tub to the customer because he was trying to sell his products.

Who is he referring to in this sentence?
---
Answer:
The salesman

Question:
The father convinced his son that it is possible for him to one day become a knight, but he may never achieve such status coming from a peasant family.

Who is he referring to in this sentence?
---
Answer:
his son