Utilize the input text as a context reference, choose the right relationship between Cigna and health insurance 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.

Insurer Anthem sealed a $54.2 billion deal to buy rival Cigna (NYSE: CI - news ) , in a further consolidation of the US health insurance industry in the wake of the US Affordable Care Act.

Answer: product_or_material_produced