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: "When did Rudolf Clausius introduce the second law of thermodynamics?" whose answer is 1850.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did Rudolf Clausius introduce the second law of thermodynamics
Useful Output:

Doc 1: Rudolph Clausius is kind enough in his 1879 work “The Mechanical Theory of Heat” (Clausius, 1879) to indicate where we have been in our
Doc 2:  Second Law—pursued most notably by Rudolf Clausius. In 1854 Clausius was already beginning this process. Perhaps confusingly, he refers to
Doc 3: Rudolph Clausius is well known as a pioneer of the mechanical theory of heat (1857) and as the creator of the concept of entropy (1865).
Doc 4: Oftentimes, he is also called the discoverer of the second law of thermodynamics  But beyond any doubt, it was Clausius who gave in 1850 the
Doc 5: But beyond any doubt, it was Clausius who gave in 1850 the first  second law of thermodynamics (1850). This paper focuses on his