With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Headlines are usually provided at 15 minutes past the hour with a full bulletin after the bottom-of-the-hour headlines. There are also extended sports bulletins per day, entitled "Sportsday" or "Sport Today" (when simulcasting with BBC World News) broadcast at 00:45, 01:45, 02:45, 03:45, 13:30, 18:30, 19:30 (weekends only), 22:30 (weekdays only). Each bulletin is read by a single sports presenter, with the exception of Saturday "Sportsday", which is double headed.
text_B: Do all of the bulletins have less than two presenters?
NO.