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people; (all) persons; everyone; ladies and gentlemen
ご参加の方がたにお礼を申し上げます。
I would like to express my gratitude to all participants.
方がたのご協力のおかげで成功しました。
It was a success thanks to everyone's cooperation.
お忙しい方がたにお時間をいただき感謝。
I appreciate you busy people taking the time.