11.   The Irish potato famine was caused by a plant disease that raced through crops containing no genetic resistance.

12.   The Irish potato famine.

13.   The prime minister says England has much to feel sorry about for the Irish potato famine.

14.   We planted sweet potatoes and Irish potatoes, cantaloupes and melons.

15.   William R. Grace, who had fled the Irish potato famine to Peru, chartered ships to trade bat guano and bird droppings.

16.   McNeely cites the Irish potato famine as a classic example of species invasion.

17.   New York State Gov. George Pataki signed a bill last year requiring the Irish potato famine to be taught to New York state school children.