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 and where was oil discovered in nigeria?" whose answer is Oloibiri Oilfield.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when and where was oil discovered in nigeria
Useful Output:

Doc 1: Nigeria joined the ranks of oil producers in 1958 when its first oil field came on stream producing 5,100 bpd. After 1960, exploration rights in
Doc 2: Share your videos with friends, family, and the world.
Doc 3: The Nigerian National Petroleum Company (NNPC) and its compatriot joint venture (JV) partner First Exploration & Petroleum Development
Doc 4: Nigeria joined the ranks of oil producers in 1958 when its first oil field came on stream producing 5,100 bpd. After 1960, exploration rights in
Doc 5: Since oil was discovered in commercial quantities in Nigeria in 1958, thousands of oil spill incidents have happened.