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 ex-officio chairman of the rajya sabha?" whose answer is Venkaiah Naidu.
Each document should contain about 30 words, and these documents should contain useful information.

Query: ex-officio chairman of rajya sabha
Useful Output:

Doc 1: The Vice-President of India is the ex-officio Chairman of the Rajya Sabha. The Deputy Chairman presides at the sittings of the House in the
Doc 2: The Vice-President of India is the ex-officio chairperson of the Rajya Sabha. The Vice-President officiates as President in case of death,
Doc 3: The Vice-President is the ex-officio chairman of the Rajya Sabha. · The Vice-President as Chairman of the Rajya Sabha is the unchallenged
Doc 4: The Vice-President of India is the ex officio Chairperson of the Council of States (Rajya Sabha) because Article 64 of Chapter 1 of Part V of
Doc 5: The Vice President of India is the ex-officio Chairman of Rajya Sabha. The House also elects a Deputy Chairman from among its members.