Refer to the input text as context and select the correct relationship between 'energy company' and 'natural gas' from the available options.
Options: developer, creator, product/material produced, director/manager

federal energy regulators on Tuesday alleged traders at the U.S. arm of French energy company Total SA (Paris: FR0000120271 - news ) manipulated the natural gas market in the southwestern United States between June 2009 and June 2012.
product/material produced