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: "Ronald de Boer is the older twin brother of this Dutch former footballer born in what year?" whose answer is 1970.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Ronald de Boer twin brother
Useful Output:

Doc 1: There have been quite a few good twins in football and I thought it would be fun to list a few: Frank & Ronald de Boer combined 215 UEFA club competition
Doc 2: By James Black Rangers legend Ronald de Boer has revealed that twin brother Frank would find Rangers “very difficult to say no to” if they…
Doc 3: Ronald de Boer is the twin brother of Frank de Boer. Ronald de Boer is the uncle of Ruud Jong (Retired). Ronald de Boer is the uncle of Jaap Jong (Retired).
Doc 4: But while the elder twin Ronald dabbled in coaching before becoming a television analyst, Frank has continued in the game, winning four league
Doc 5: Ronald de Boer, the twin brother of former Inter Milan manager Frank de Boer spoke about the unluckiness that his twin had this season at Inter Milan.