Text summarization with limited number of words

I am reviewing summarization techniques and haven't (yet) found an approach to limit the length of a summary. So for example a summarization function that gives me a summary that is 500 words.

Can you point me in the right direction? Are there approaches/implementations out there that try to solve this challenge?

Appreciate your replies!

Topic automatic-summarization nlp

Category Data Science

1
answered at

LDA, Latent Dirchlet Allocation, also allows to specify number of topics.

1
answered at

You sure can,

for example in latent semantic analysis you can fixate number of topics (which is actually size of the decomposition matrix) beforehand.

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