Challenges in NER

Despite advancements, NER still faces several challenges:

  • Ambiguity: Many words can have multiple meanings. For instance “Apple” can refer to a fruit or a company. Manual cleaning may be required in such cases to ensure that entities are correctly tagged.
  • Context Dependence: The meaning of an entity can depend on its context (e.g., “Washington” can refer to a state or a city).
  • Limited Training Data: For specific domains or languages, there may be insufficient labeled data for training accurate models.

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