Use this to help you. I had homework on this. Found the answers for you. Just open the link.
http://www.krollpatrol.com/uploads/4/7/6/0/4760591/answers-to-acts-1-to-3.pdf
Are you asking what a fireman is? cause if so it is someone who puts out fires at burning houses, barns.etc (anything on fire) hope that helps :)
I believe it’s called an antecedent.
Message me for help,I am really good at this stuff