UPER: Boosting Multi-Document Summarization with an Unsupervised Prompt-based Extractor

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Knowledge Triples

Source Entity	Relationship	Target Entity
Extract then Abstract Paradigm Method	employs	Deep Neural Networks Method
Multi Document Summarization Task	uses	Extract then Abstract Paradigm Method
Perplexity Metric	assesses	Semantic Salience Metric
Scoring Model Method	evaluates	ROUGE Score Metric
Unsupervised Approach Method	appliesTo	MDS Datasets Material
Unsupervised Approach Method	improves	Semantic Salience Metric