task_categories:translation language:ru language:en license:apache-2.0 size_categories:1K<n<10K format:json modality:text library:datasets library:pandas library:polars library:mlcroissant region:us poetry translation validation test train English Russian bilingual csv contrastive preference classics modernism Slavic Soviet translated professional manual human organic lyrics USSR Russia SFT literature literary lyrical reinforcement training human-curated high-fidelity culture interlinear