Utilize the input text as a context reference, choose the right relationship between Nottingham Post and Local World 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.

The publisher of the national Mirror titles and 'big city' newspapers including the Liverpool Echo and Manchester Evening News has a 20% stake in Local World - a rival behind papers such as the Nottingham Post and Leicester Mercury.

Answer: owned_by