Utilize the input text as a context reference, choose the right relationship between 'Citigroup' and 'financial services' from the options.
Options: director/manager, location of formation, publisher, industry

About half the recruits for senior-level openings at mid-size banks are people whose resumes lead with names including Citigroup Inc. and JPMorgan Chase & Co., estimates Robert Voth, managing director in the financial services group at Russell Reynolds Associates, a recruiting firm.
industry