You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who was the last president of the us to be impeached?" whose answer is Bill Clinton.
Each document should contain about 30 words, and these documents should contain useful information.

Query: last us president impeached
Useful Output:

Doc 1: Andrew Johnson, President of the United States, Impeached February 24, 1868, on charges of violating the Tenure of Office Act by removing Secretary of War
Doc 2: President Donald Trump has become the first president in history to be impeached twice by the US House of Representatives - and remains one of just three to
Doc 3: Three presidents have been impeached, although none were convicted: Andrew Johnson in 1868, Bill Clinton in 1998, and Donald Trump twice, in 2019 and 2021.
Doc 4: This section covers impeachment proceedings against four presidents: Andrew Johnson, Richard Nixon, William J. (Bill) Clinton, and Donald J. Trump.
Doc 5: Votes for criminal convictions in the US Senate, following the impeachment of Presidents Johnson, Clinton and Trump, between 1868 and 2021