I'll give you a question, please answer with step-by-step reasoning process.
Context: American cheese, Cheez Whiz, and provolone are the most commonly used cheeses or cheese products put on to the Philly cheesesteak.\n\nQuestion: what kinda cheese is on a philly cheesesteak?

American cheese
The relevant information to answer the above question is: American cheese, Cheez Whiz, and provolone are the most commonly used cheeses or cheese products put on to the Philly cheesesteak.

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The answer is American cheese