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 singapore officially became a part of the british empire?" whose answer is 1946.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did singapore officially become a part of the british empire
Useful Output:

Doc 1: In 1824, a further treaty with the Sultan led to the entire island becoming a part of the British Empire. In 1826, Singapore became part of the Straits
Doc 2: 1867 - Straits Settlements become crown colony of British Empire. 1869 - Suez Canal opens, trade booms. 1922 - Singapore becomes main British
Doc 3: Singapore joined the Commonwealth in October 1965 after gaining independence, and regularly participates in the biennial Commonwealth Heads of Government
Doc 4: 1826 – Singapore becomes part of the British colony of Straits Settlements under the rule of the East India Company, together with Malacca and
Doc 5: After tumultuous internal political problems and negotiations with the British, the UK granted the colony complete internal self-government in 1959. British-