Utilize the input text as a context reference, choose the right relationship between Lafarge and cement 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.

This follows hot on the heels of the ?6.5bn acquisition of Lafarge and Holcim's cement assets, and boosts the firm's growth profile still further.

Answer: product_or_material_produced