On Tuesday, a Dutch museum published two never before seen pages of Anne Frank’s diary, which were originally stuck together.

On the two pages, 13-year-old Anne, wrote down four “dirty” jokes and over 33 lines of an explanation of sex, contraception and prostitution, according to the Anne Frank House. The two-page entry was signed on Sept. 28, 1942.

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“I sometimes imagine that someone might come to me and ask me to inform him about sexual matters,” Frank wrote in Dutch in her diary. “How would I go about it?”

“Anyone who reads the passages that have now been discovered will be unable to suppress a smile,” Frank van Vree, the director of the Netherlands Institute for War, Holocaust and Genocide Studies, said in a statement following the publishing. “The ‘dirty’ jokes are classics among growing children. They make it clear that Anne, with all her gifts, was above all also an ordinary girl.”

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It was not determined why the pages were stuck behind brown sticky paper, but the researchers have come to believe it was done because Frank was trying to hide her provocative content from her father or anyone else who might have came across it when they were all living in the cramped attic.

The statement also revealed that the pages were recovered using image-processing technology. Photos of the pages were taken in 2016 and the software was able to help decipher the words.

Ronald Leopold, the executive director at the Anne Frank House, believed that sharing these photos would give the world a closer look into Anne Frank. “Given the great public and academic interest we have decided … to publish these texts and share them with the world,” Leopold said in a statement. “They bring us even closer to the girl and the writer Anne Frank.”