Definition: In this task, you are given a statement spoken by a politician in natural language. Your task is to generate the subject of the discussion for the given statement. The subject generated is not necessarily a part of the given input. Your answer should contain one or more words.
Input: Puerto Ricos $70 billion debt is unsustainable and it is unpayable. And the reason why it is unsustainable has everything to do with the greed of Wall Street vulture funds.

financial-regulation