Diachronia year prediction

Guess the time when a Polish excerpt was published [ver. 1.0.0]

Git repo URL: git://gonito.net/diachronia-year-prediction / Branch: master
Run git clone --single-branch git://gonito.net/diachronia-year-prediction -b master to get the challenge data
Browse at https://gonito.net/gitlist/diachronia-year-prediction.git/master

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