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Finally one i can answer. The answer is Idiom
Answer:
I think Anne feels annoyed with Peter, since he cheated on her with Hitler. She talked to Stalin about her problems. Stalin told her that he could help by taking Hitler out. so she did so.
Demonstrating bravery huh? It doesn't seem too hard to explain. Say, for example your talking about a fictional story, right? Depending on what that said character does, depends on his/her bravery for he/she did. If you can implement something similar to that in whatever it was you had in mind, it might help.
I really hope this helps.