In the context of the input sentence, determine the relationship between 'Man Group' and 'hedge fund'.
Options: chief executive officer, industry, stock exchange, currency

SHANGHAI, Aug 31 (Reuters) - Chinese authorities have taken Li Yifei, chairwoman of British hedge fund manager Man Group (LSE: EMG.L - news ) Plc's China unit, into custody to help with a police probe into market volatility, Bloomberg reported on Monday, citing a person familiar with the matter.
industry