Понимание структурно-смысловых связей в тексте

Прочитайте текст и заполните пропуски A—F частями предложений, обозначенными цифрами 1—7. Одна из частей в списке 1—7 лишняя. Занесите цифру, обозначающую соответствующую часть предложения, в поле ответа.

1. in which three high school students throw a birthday party that spins out of control
2. including the 16th birthday party of British teenager Bradley McAnulty in April 2016
3. of whom 30,000 confirmed online that they planned to attend
4. but were interrupted by the police
5. and they were posted on YouTube
6. so it wasn’t just her friends who could see details of the event
7. which received hundreds of thousands of hits