Refer to the input text as context and select the correct relationship between 'Lafarge' and 'cement' from the available options.
Options: founded by, publisher, product/material produced, position held

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