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: "Know for having the first Harvard course available online, what book about political philosophy did this professor write?" whose answer is Liberalism and the Limits of Justice.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Michael Sandel Harvard first online course
Useful Output:

Doc 1: Your browser can't play this video. Learn more. More videos on YouTube. Share. Include playlist. An error occurred while retrieving sharing information.
Doc 2: Back in 2009, Harvard political philosopher Michael Sandel made his course, Justice: What's the Right Thing to Do?, available on the web for
Doc 3:  Michael Sandel—a Harvard professor whose popular course  His “Justice” course is the first Harvard course to be made freely available online
Doc 4: In 2009, a recorded version went on to become the first Harvard course freely available online – with more than 38 million watching the
Doc 5: Harvard University and WGBH Boston have posted online Michael Sandel's very popular course  first lesson.If You know the link that does