RetroC temporal classification challenge for Vietnamese

Guess the publication year of a Vietnamese text. The metric is root mean square error. [ver. 1.0.0]

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kubapok   2020-01-09 17:28

submitted a solution:tfidf lr

p/tlen   2016-03-13 09:04

submitted a solution:Vowpal Wabbit -nn 6 on up to 4-grams (for characters)

p/tlen   2016-03-13 08:51

submitted a solution:by year references

p/tlen   2016-03-13 08:43

submitted a solution:null model (always return 1990.0)