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 oando commence business operations as a petroleum marketing company?" whose answer is 1956.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did oando start business operations
Useful Output:

Doc 1: Oando Energy Services Limited incorporated in 2005 is Nigeria's largest indigenous oilfield services provider, enhancing indigenous
Doc 2: Long before the Angola and Trinidad and Tobago deals, Oando had been actively involved in oil exploration in São Tomé and Príncipe's Exclusive
Doc 3: For Oando Energy Services Limited incorporated in 2005, it is Nigeria's largest indigenous oilfield services provider, enhancing indigenous
Doc 4: Tinubu's story began in 1990 as an attorney, specialising in corporate and petroleum law. He then co-founded Ocean and Oil Group in 1994, which
Doc 5: Oando PLC is one of Africa's largest integrated energy solutions provider with a proud heritage. It has a primary listing on the Nigeria Stock Exchange and