What is the relationship between 'Berkshire Hathaway' and 'Warren Buffett' in the context of the input sentence.
Options: developer, location of formation, chief executive officer, operator

Other Articles American Airlines Boeing 777-200 flight lands in Japan for generator issue ICRA downgrades Jindal Steel and Power ratings Warren Buffett says Berkshire Hathaway still shopping abroad Infrastructure company IL&FS Transportation Networks today said its subsidiaries have signed two agreements with NHAI worth Rs 4,173.92 crore for four-laning two sections of NH-6 in Maharashtra.
chief executive officer