Key phrase extraction vs named entity recognition vs sentiment analysis and opinion mining vs summarization

This sheet compares Key phrase extraction, Named entity recognition, Sentiment analysis and opinion mining, Summarization.

CriterionKey phrase extractionNamed entity recognitionSentiment analysis and opinion miningSummarization
Output shapeA list of main concepts as termsA preset list of entity types: people, places, organisations, quantitiesA positive, neutral or negative label, optionally linked to a specific attributeA condensed passage - salient sentences extracted, or new sentences generated

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