Question: Which pizza chain is based in Dayton Ohio, Marion's Piazza or Sal's Pizza?

Context paragraphs:
Freshslice Pizza: Freshslice Pizza is a Canadian franchised pizza chain in restaurants located throughout British Columbia, and one location in Toronto as of 2016.  The first restaurant opened in 1999 in Vancouver, British Columbia.  Today, Freshslice Pizza is the second-largest pizza chain in British Columbia behind Panago in terms of locations open.

Pizza delivery: Pizza delivery is a service in which a pizzeria or pizza chain delivers a pizza to a customer.  An order is typically made either by telephone or over the internet to the pizza chain, in which the customer can request pizza type, size and other products alongside the pizza, commonly including soft drinks.  Pizzas may be delivered in pizza boxes or delivery bags, and deliveries are made with either an automobile, motorized scooter, or bicycle.  Customers can, depending on the pizza chain, choose to pay online, or in person, with cash, credit or a debit card.  A delivery fee is often charged with what the customer has bought.

Papa Murphy's: Papa Murphy's, a business based in Vancouver, Washington, United States, is a take-and-bake pizza company.  It began in 1995 as the merger of two take-and-bake pizza companies: Papa Aldo's Pizza (founded in 1981) and Murphy's Pizza (founded in 1981).  The company and its franchisees operate more than 1,300 outlets in the United States and Canada.  Papa Murphy's is the fifth-largest pizza chain in the United States.

Blackjack Pizza: Blackjack Pizza is a Colorado-based pizza delivery chain founded in 1983 by a former Domino's Pizza employee, Vince Schmuhl, because Domino's Pizza was the only major pizza delivery company in the Rocky Mountain region and he thought customers would appreciate an alternative.  The pizza chain is the largest in Colorado with 800 employees, some of whom work part-time.  On January 1, 2013, Blackjack Pizza was acquired by Askar Brands.

Sal's Pizza: Sal's Pizza is a chain of Italian restaurants based in New England, best known for pizza.  The chain is owned by Sal's Group, owner of Salvatores, Mary's Pasta & Sandwiches, and Riverwalk Properties.  The company's franchises prepare a combined total of over 60,000 pizzas weekly.

Rabbe Grönblom: Rabbe Anders Grönblom (May 3, 1950 Helsinki, Finland – June 29, 2015) was a Finland-Swedish businessman who started a successful pizza business in Vaasa, Finland.  His first company—a pizzeria—was called "O sole mio" and it was founded in 1976 in the center of Vaasa.  From there he expanded to a pizza franchise chain first called "Pizzeria N:o 1".  He was known as the "Pizza-emperor" (Pizzakeisari in Finnish), because he was the founder of a well known pizza franchise chain called Kotipizza which was the new name of "Pizzeria N:o 1" which expanded fast outside of Vaasa.  The chain is said to be the biggest one in the Nordic countries.  He was also the founder of a shipping company called RG Line, a hotel chain called Omenahotelli and another pizza chain called Golden Rax Pizzabuffet.  Most of his companies are subsidiaries of Grönblom International LTD, where Rabbe Grönblom acted as director.  Golden Rax Pizzabuffet however is nowadays a part of Finland's largest hotel & restaurant company Restel Oy Ltd, where Rabbe Grönblom sat on the board.  He was also on the board of the Finnish tyre company Nokian Renkaat (since 2003).

Peppes Pizza: Peppes Pizza is a Norwegian pizza chain that serves American style and Italian style pizza.  Peppes is the largest pizza chain in Scandinavia.  The restaurant was founded by two Americans, Louis Jordan and his wife Anne from Hartford, Connecticut.  The restaurant chain is part of Umoe Catering As which consists of restaurants such as Burger King, TGI Fridays, La Baguette and Cafe Opus.  Peppes Pizza is one of the first restaurants that brought foreign food to Norway.  9 million pizzas are served by Peppes each year with deliveries in 11 cities in Norway.  Their menu was first put online in March 1995.  The servings have been described as enough for two people and that the pizza chain is "a cut above the rest".

Marion's Piazza: Marion's Piazza is a pizzeria chain based in Dayton, Ohio.  Established in 1965 by Marion Glass, the company currently operates 9 restaurants throughout the greater Dayton area.  Marion's is renowned for its unique style of pizza, characterized by its traditional preparation and small square slices.  The chain is intensely popular with Dayton locals and has been awarded the title of "Best Pizza" 2 times.

Pizza Cuz: Pizza Cuz is a television series airing on the Cooking Channel.  The show follows Francis Garcia and Sal Basille, two cousins who own the New York pizza chain Artichoke Basille, as they travel the US visiting the top pizza shops in the country.

Cassano's Pizza King: Cassano's Pizza King, currently operating under the brand Cassano's, is a pizzeria chain based in Kettering, Ohio, a suburb of Dayton.  Established on June 4, 1953, by the Kettering grocer Victor "Vic" J. Cassano, Sr. (June 4, 1922 – January 1, 2002) and his mother-in-law Caroline "Mom" Donisi, the company currently (2005) operates 34 Cassano's Pizza King restaurants in the Dayton area, and has three other western Ohio franchises (in Russells Point, Fairfield and Sidney), plus a franchise in Quincy, Illinois, and another in Hannibal, Missouri.  The company also operates dozens of Cassano's Pizza Express kiosks in gas stations, convenience stores and hotels, and sells frozen pizza dough under the name Cassano's Fresh Frozen Dough Company.

Supporting paragraphs: Marion's Piazza Sal's Pizza
Answer: Marion's Piazza