 Complete the following phrase:  Parisers idea of the filter bubble was popularized after the TED talk he gave in May 2011, in which he gives examples of how filter bubbles work and where they can be seen. In a test seeking to demonstrate the filter bubble effect, Pariser asked several friends to search for the word Egypt on Google and send him the results. Comparing two of the friends first pages of results, while there was overlap between them on topics like news and travel, one friends results prominently included links to information on the then-ongoing 