Separately, I'd like to note a few words about the retail network, an important event here that the Gazprom Neft went out to introduce modern technologies for energy efficiencies, modernizing the equipment at more than 600 of its retail location, which enabled us to raise the level of energy efficiency by 50%.
Refer to the input text as context and select the correct relationship between 'Gazprom Neft' and 'retail' from the available options.
Options: chairperson, manufacturer, industry, brand