A key, or sometimes a guide.
To get to safety, Winton's children had to travel through the heart of Nazi Germany. Eight trains departed from Warsaw between March and August 1939
Explanation:
I think they is referring to the audience
Listen I would answer this for you, but there are programs that <em>all</em> English teachers <em>always</em> use to make sure you didn't just steal someone else's work. If somebody writes this paragraph for you and you take it for yourself that's called <u><em>Plagiarism</em></u>. And I don't want you to get into trouble for that since it <em>is </em>something very serious.
