Question: Which Italian restaurant was founded first, Valentino's or Regina Pizzeria?

Context paragraphs:
Tutta Bella Neapolitan Pizzeria: Tutta Bella Neapolitan Pizzeria is an Italian restaurant chain with five locations in Washington State.  The first location was founded in 2004.  The restaurant specializes in "authentic" Neapolitan pizza and is certified by the non-profit Associaziona Verace Pizza Napoletana ("True Neapolitan Pizza Association") which certifies pizzerias that use traditional ingredients and processes.  Tutta Bella was the first restaurant in the Pacific Northwest to receive such certification.

Pizza Land: Pizza Land is an independently owned pizzeria located at 260 Belleville Turnpike in North Arlington, New Jersey, which featured in the opening credits of "The Sopranos".  Additionally, in "Law & Order" episode 10.6, "Marathon" (1999), a pizza box from the restaurant was used by a suspect to transport and conceal firearms.  The pizzeria was opened in 1965 by Italian immigrant Frank Di Piazza, who died in 1991.  The pizzeria was built by Pietro Di Piazza.  It was owned by Frank's son Tony Di Piazza .  Tony and Debra Hunkele always had the pizzeria packed but later on sold to pizza maker Al Pawlowicz until his death in 2010, who purchased the restaurant from DiPiazza's son.  The store is now owned by Eddie Twdroos.

Regina Pizzeria: Regina Pizzeria, also known as Pizzeria Regina, and originally called Regina Pizza, is a regional pizza chain in New England.  The company was founded in 1926 by Luigi D'Auria in Boston's North End neighborhood.  It has been run by the Polcari family since 1956.  The chain is a part of Boston Restaurant Associates and is headquartered in Lynnfield, Massachusetts.

8½ Otto e Mezzo Bombana: 8½ Otto e Mezzo Bombana is an Italian restaurant at Shop 202, Alexandra House, Central, Hong Kong.  It is the only Italian restaurant outside of Italy to have received 3 stars from the Michelin Guide, having been awarded 3 stars by the 2012 Michelin Guide Hong Kong and Macau.  Its head chef is Umberto Bombana.

Uno Pizzeria &amp; Grill: Uno Pizzeria & Grill (formerly Pizzeria Uno and Uno Chicago Grill), or more informally as Unos, is a franchised pizzeria restaurant chain under the parent company Uno Restaurant Holdings Corporation.  Uno Pizzeria and Grill is best known for its Chicago-style deep dish pizza.  Ike Sewell opened the first Pizzeria Uno in 1943.

Valentino's: Valentino's is a regional Italian restaurant chain based in Lincoln, Nebraska.  Valentino's was founded by Val and Zena Weiler in 1957.  The restaurant was purchased by two Lincoln families in 1971 and began franchising additional locations.  The first carry-out store opened in 1990, and many of the full-scale restaurants converted to the buffet concept in the early-2000s.

Vivo Italian Kitchen: Vivo Italian Kitchen is a restaurant located at Universal Orlando Resort's CityWalk.  It is an Italian restaurant located between NBC Sports Grill & Brew Restaurant and Emeril's Restaurant.  This is also in front of The Cowfish restaurant.  Vivo serves moderately priced traditional Italian food and has an array of wines and beers to choose from.  The restaurant opened in 2015.

Mosconi (restaurant): Mosconi is an Italian restaurant located at 13 rue Munster in the Grund district of Luxembourg City, Luxembourg, overlooking the Alzette River.  Headed by chef Illario Mosconi, formerly from Lombardy, Italy, it is one of the Relais & Châteaux series of hotels and gourmet restaurants from around the world.  The menu is an eight-course set menu of pasta dishes prepared with most of the ingredients imported from Italy.  Mosconi became the first Italian restaurant to receive a Michelin star in Benelux.  For a time, it had two Michelin stars but reverted to just one again in the guide for 2014.

Probka Restaurant Group: Probka Restaurant Group (Russian Cyrillic: ресторанная группа Пробка) is a restaurant group that was founded by Aram Mnatsakanov in 2001 with the establishment of the wine bar, Probka (English translation: wine bottle cork), and the Italian restaurant, Il Grappolo, in St. Petersburg.  It now consists of nine Italian restaurants and one Russian restaurant which are spread all over St. Petersburg.  It consists of Ryba Na Dache, Probka, Mozzarella Bar, Gusto and Il Grappolo restaurants among others.  The Probka restaurant network consists of a strict Italian cuisine.  Although this is the case, the group is experimenting with Asian cuisine as well.  To date there are three restaurants with the name "Mozzarella Bar," the last one having been opened in February 2010.  These restaurants are among the most successful and popular in St. Petersburg.  Probka has become a very influential group in the Russian restaurant industry with mainly Italian cuisine.

Barbetta: Barbetta is an Italian restaurant focused on Piemonte cuisine located at 321 West 46th Street (between 8th Avenue and 9th Avenue) on the Theater District's Restaurant Row in New York City.  Founded in 1906, Barbetta is the oldest Italian restaurant in New York and the oldest restaurant in the Theater District.  It holds many other firsts from its food innovations.

Supporting paragraphs: Regina Pizzeria Valentino's
Answer: Regina Pizzeria