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 first indian whose official residence was rashtrapati bhavan?" whose answer is Chakravarti Rajagopalachari.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was rashtrapati bhavan converted into the official residence of the president of india
Useful Output:

Doc 1: The construction of the Rashtrapati Bhavan, which is the official residence of the President of India, began in 1912 and was completed in 1929.
Doc 2: Originally built as the residence for the Viceroy of India, Viceroy's House as it was then called, has metamorphosed into today's Rashtrapati
Doc 3: On 26 January 1950, when Rajendra Prasad became the first President of India and occupied this building, it was renamed Rashtrapati Bhavan – the President's
Doc 4: When former President of India, Pranab Mukherjee and his wife (who passed away in 2015) moved into Rashtrapati Bhavan in 2012,
Doc 5: The present day Rashtrapati Bhavan was made into the residence of the British Viceroy when the capital of India was shifted from Calcutta to