Utilize the input text as a context reference, choose the right relationship between Boston Pizza and restaurant from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Boston Pizza opened no new full service restaurants during the quarter and has opened one new full service restaurant year-to-date.

Answer: product_or_material_produced