Utilize the input text as a context reference, choose the right relationship between 'Lafarge' and 'cement' from the options.
Options: publisher, position held, founded by, product/material produced

The deal, to be executed by Birla Corp and its subsidiaries, calls for the acquisition of Sonadih cement plant in Chhattisgarh, the grinding unit at Jajobera in Jharkhand, as also the Concreto and PSC brands of Lafarge India, the company said in a regulatory filing.
product/material produced