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Mercurial means to have a sudden change of heart in something like in your mood or mind. I think Anne had a change of heart in Mr. Dussel when he started saying mean things about her.

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The green police was the Nazi police. They were called The green police because they had a green pennant on there uniforms.

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A ration book is a book of stamps. The stamps were used to get food like sugar, oil, and meat.

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This is a famous church. It is the biggest protestant church in he world.

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Conspicuous means the stand out or you could be easily seen by someone. Anne's family wanted to be inconspicuous so they wouldn't be seen.

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The star of David was a badge that had the word Jude or Jew on it. The Nazis forced the Jews to wear it.

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The black market was response to the ration books. The black market had a lot of things like cigarettes and alcohol.

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The biggest church in Amsterdam is The Westerkerk. The church was built in 1638.