examples/legacy/token-classification/tasks.py/NER/get_labels
class NER:    def get_labels(self, path: str) -> List[str]:
        if path:
            with open(path, "r") as f:
                labels = f.read().splitlines()
            if "O" not in labels:
                labels = ["O"] + labels
            return labels
        else:
            return ["O", "B-MISC", "I-MISC", "B-PER", "I-PER", "B-ORG", "I-ORG", "B-LOC", "I-LOC"]