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: The U.S. spends $4 billion on research and development for energy, while spending $350 billion on oil from foreign countries, "many of whom are our enemies."

oil-spill