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Returns the unique classifications in the document
labels_unique(data, info = "all")
list. With up to two elements, $labels and $relations, containing the respective elements.
$labels
$relations
character or WebAnnoTSV. The contents of a WebAnno TSV v3.3 file as created by webanno_open or a path leading to it.
webanno_open
character. A choice of "labels", "relations" and "all" on what to extract.
example = arete_data("annotations")[[1]] labels_unique(example, info = "all")
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