给出一篇英语文章的段落，要求你将其中的所有主语抽取出来，并按照在文章中出现的顺序排列。 


"Last night, as I was sitting on my couch, I heard a loud noise outside. I got up and looked through the window to see what had happened. I saw a group of teenagers riding their bikes recklessly on the sidewalk. They were shouting and laughing as they rode past my house. I immediately called the police to report their behavior."
I, noise, group, teenagers, they, police