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 paracetamol become available in the uk?" whose answer is 1956.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did paracetamol become available in the uk in the 20th century
Useful Output:

Doc 1: Paracetamol was first made in 1878, but only became more widely used in the 1950s. Today paracetamol is one of the most widely used painkillers
Doc 2: Paracetamol was discovered in the late 19th century, but it was rejected almost immediately because of a bizarre side effect: it seemed to
Doc 3: In 1956, 500 mg tablets of paracetamol went on sale in the United Kingdom under the trade name Panadol, produced by Frederick Stearns & Co, a
Doc 4: Paracetamol is a non-opioid analgesic recommended for the first-line management of mild to moderate pain and pyrexia, safe in all patients except for those
Doc 5: In 1956, 500 mg tablets of paracetamol went on sale in the United Kingdom under the trade name Panadol, produced by Frederick Stearns & Co, a