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: In 1947, when I was born, there were about 450,000 lions. In the mid-70s, when my kids were born, there were about 100,000. Today, there are less than 30,000.

environment