
Explanation:
Natural language processing (NLP) is used for tasks such as sentiment analysis, topic detection, language detection, key phrase extraction, and document categorization. Therefore, the correct answer is B: document categorization. The other options (document summarization, text translation, and speech recognition) are not explicitly listed as tasks in this context.
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In the context of NLP, which task is not listed among the following: sentiment analysis, topic detection, language detection, and key phrase extraction?
A
document summarization
B
document categorization
C
text translation
D
speech recognition