What is the relationship between 'SK Group' and 'SK' in the context of the input sentence.
Options: platform, member of, currency, owned by

5 Questions About SK Group The Wall Street Journal – 1 hour 52 minutes ago Print Chey Tae-won, chairman South Korea’s third-largest conglomerate, SK Group, is free to resume his duties now that an Aug. 13 pardon by President Park Geun-hye has brought an early end to his four-year prison sentence.
owned by