Utilize the input text as a context reference, choose the right relationship between 'Holcim' and 'cement' from the options.
Options: platform, chairperson, employer, product/material produced

The announcement on Wednesday came about two months after cement companies Holcim (Other OTC: HCMLF - news ) and Lafarge (Paris: FR0000120537 - news ) , which have agreed to merge, said CRH would buy some of their assets for 6.5 billion euros ($7.12 billion).
product/material produced