Utilize the input text as a context reference, choose the right relationship between 'Rosneft' and 'Igor Sechin' from the options.
Options: currency, business division, distributed by, chief executive officer

MOSCOW, Sept 4 Rosneft plans to launch the plant to liquefy natural gas (LNG) on Russia's Pacific Island of Sakhalin after 2020, Chief Executive Igor Sechin said in his presentation, behind the initial schedule.
chief executive officer