Erica Paul (left) and Danielle Gallagher serve lunch to John Houlihan and other seniors attending the New York Irish Center’s Wednesday Lunch Club in Queens, N.Y. On a wall of historical memorabilia hanging behind them is an old sign saying “HELP WANTED, NO IRISH NEED APPLY.”

The Census Bureau says people who mark "White" for their race will be asked to write in their origins in countries such as Ireland. Some white people say they're not sure how to answer that question