Subgame Perfect Equilibrium
Table:
Subgame Perfect Equilibrium
Subset of	Nash equilibrium
Intersects with	Evolutionarily stable strategy
Proposed by	Reinhard Selten
Used for	Extensive form games
Example	Ultimatum game

From the table, decide if the statement is entailed, neutral, or refuted by the data. Return the result as JSON: {"answer": "YOUR ANSWER"}.

Statement: Subgame Perfect Equilibrium is a strategy employed in games.

answer: entailed