Question: Between Donatos Pizza and Extreme Pizza what is the only country to have one of these restaurants besides the United States?

Context paragraphs:
Happy Joe's: Happy Joe's Pizza & Ice Cream Parlor is an American pizza parlor chain based in Bettendorf, Iowa.  The restaurant chain was founded in 1972 by Lawrence Joseph "Happy Joe" Whitty, a former Shakey's Pizza manager.  Its 61 restaurants are mostly located in the Midwestern United States (in Iowa, Illinois, Missouri, Minnesota, North Dakota and Wisconsin). , although the company is also present in Arizona.  The idea for Happy Joe's came from a combination of a pizza parlor and ice cream palace.

Donatos Pizza: Donatos Pizza is a pizza delivery restaurant chain headquartered in Columbus, Ohio.  It has nearly 200 locations in eight states, with the majority of locations in Ohio.  Donatos is also served at several venue outlets including Ohio Stadium and the Smithsonian National Air and Space Museum.

Pizza Factory: Pizza Factory Inc. is a chain of pizza restaurants in the western United States, based in Oakhurst, California.  The company began in 1979, when Danny Wheeler and his wife Carol opened Danny's Red Devil Pizza in Oakhurst.  Ron Willey and his wife Joyce subsequently opened a second location in 1981, known as Pizza Factory.

Extreme Pizza: Extreme Pizza is a privately held restaurant franchise chain specializing in conventional and California-style pizza, founded by Todd Parent and Michael Pastor in 1994 in San Francisco, California.  The chain currently includes over 30 locations in the United States, and one in Ireland.  Most franchises are located in Northern California, as well as other states including Colorado, Texas, Virginia, Washington, Oregon, Idaho, and Michigan.

Santarpio's Pizza: Santarpio's Pizza is a well-known restaurant in the neighborhood of East Boston, Massachusetts, United States.  It was originally established in 1903 as a bakery.  Frank Santarpio began selling pizza there three decades later.  A landmark to locals and a destination for visitors, the eatery is primarily known for its New York-style pizza, which it has served at its Chelsea Street location since 1933.  One "Boston Globe" reporter said of the establishment that "[t]he average New Englander's only knowledge of East Boston is the sign for Santarpio's Pizza that can be seen from the highway on the way to the airport."

Greek pizza: This style of pizza may be referred to as "Greek pizza" even when it has non-Greek toppings, since it is typical of pizzerias owned by Greek immigrants.  (These pizzas are similar to the pizzas served in Italian-style restaurants in Greece itself.)  These establishments often also sell Greek specialties, such as Greek salads and gyros, and tend to brand themselves as "Pizza and Pasta" or as a "House of Pizza"; a code signifying that it is not an Italian restaurant, but a Greek restaurant serving Italian-style food.  In the United States, the latter usage is common in New England cuisine.

Fox's Pizza Den: Fox's Pizza Den is a pizzeria chain based in Murrysville, Pennsylvania, United States.  It was founded in 1971 by Jim Fox in Pitcairn, Pennsylvania, and currently has more than 250 locations in 28 U.S. states, all franchise-owned.  Fox's Pizza Den has consistently ranked among the Top 25 pizza chains in the world.  The Small Business Administration named Jim Fox as one of the country's top entrepreneurs during National Small Business Week, May 5–11, 2002.  Since that time, many Fox's Franchises have closed due to a poor business model.  The alarming rate of failure lead to the SBA discontinuing the lending of money for Fox's Franchises.  Fox's Pizza was ranked "Best Pizza Franchise" in 2007.

Sir Pizza: Sir Pizza is an United States chain of pizza restaurants.  Wendell Swartz opened the original restaurant in Lafayette, Indiana in 1957 under the name of Pizza King.  Sir Pizza was incorporated in 1965.  In 1966, Robert Swartz, Wendell's brother, expanded Pizza King outside of Indiana under the name of "Sir Pizza".  In Indiana, they are franchised under the "Pizza King" name, one of two chains in Indiana using that name.

California-style pizza: California-style pizza (also known as California pizza or Gourmet pizza) is a style of single-serving pizza that combines New York and Italian thin crust with toppings from the California cuisine cooking style.  Its invention is generally attributed to chef Ed LaDou, and Chez Panisse, in Berkeley, California.  Wolfgang Puck, after meeting LaDou, popularized the style of pizza in the rest of the country.  It is served in a number of California Cuisine restaurants.  Such restaurant chains as California Pizza Kitchen, Extreme Pizza, and Sammy's Woodfired Pizza are three major pizza franchises associated with California-style pizza.  Nancy Silverton's Pizzeria Mozza is also a popular California-style pizza restaurant in Los Angeles.

Little Caesars: Little Caesar Enterprises Inc. (doing business as Little Caesars) is the third-largest pizza chain in the United States, behind Pizza Hut and Domino's Pizza.  It operates and franchises pizza restaurants in the United States and internationally in Asia, the Middle East, Australia, Canada, Latin America and the Caribbean.  The company was founded in 1959 and is based in Detroit, Michigan, headquartered in the Fox Theatre building in Downtown.  Little Caesar Enterprises, Inc. operates as a subsidiary of Ilitch Holdings, Inc.

Supporting paragraphs: Donatos Pizza Extreme Pizza
Answer: Ireland