One of the most American American Heroes Ever.

1. Muhammad Ali was one of the greatest boxers ever.
2. His appearance at the 1996 Olympics gave the world the opportunity to cheer him.
3. He suffers from Parkinson's disease today.

This is how you find the subject of a sentence.
This is how you find the verb.
This is how you find the direct object. 
This is what a predicate nominative is.
This is what an implied subject is.