Datasets:

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biglam

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clmet_3_1

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BigLAM: BigScience Libraries, Archives and Museums 175

datasets no longer supports dataset loading scripts, so load_dataset('biglam/clmet_3_1') fails with RuntimeError: Dataset scripts are no longer supported.

This PR converts all three configs (plain, class, pos) to parquet and removes clmet_3_1.py. Parsing logic is carried over from the loading script unchanged.

One deliberate improvement: pos_tags is now a ClassLabel sequence instead of bare int32. The script only exposed the int->tag mapping through a log warning, so removing it would otherwise lose the mapping entirely. The tag names are now stored in the schema, and -1 (unknown tag) keeps its meaning.

Source data unchanged: CLMET 3.1 (https://fedora.clarin-d.uni-saarland.de/clmet/clmet.html).