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

Using the given table, determine whether the statement is entailed, neutral, or refuted. Return the result as JSON: {"answer": "YOUR ANSWER"}.

Sentence: Subgame Perfect Equilibrium is a recent piece of technology.

answer: neutral