Given the input sentence, please extract the subject and object containing a certain relation in the sentence according to the following relation types, in the format of "relation1: word1, word2; relation2: word3, word4". Relations include: 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 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).

Answer: product_or_material_produced: Holcim, cement; product_or_material_produced: CRH, cement; product_or_material_produced: Lafarge, cement