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: "Robert Selander is the Chief Executive Officer for what American multinational financial corporation?" whose answer is MasterCard.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Robert Selander CEO
Useful Output:

Doc 1: Robert W. Selander, former president and CEO of MasterCard, was asked, “What are the most important leadership lessons you have learned?”
Doc 2: Mr. Selander , a graduate of Cornell University and Harvard's Graduate School of Business Administration , served as President and CEO of
Doc 3: Mr. Selander served as President and Chief Executive Officer of Mastercard from 1997 until 2010. At Mastercard, Mr. Selander built and
Doc 4: Selander is an established leader in financial services, serving as President and Chief Executive Officer at MasterCard from April 1997 to July
Doc 5: “Mr. Selander has extensive global business, leadership and financial services experience gained during more than 13 years as CEO of MasterCard