SPACE-2: Tree-Structured Semi-Supervised Contrastive Pre-training for Task-Oriented Dialog Understanding

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Knowledge Triples

Source Entity	Relationship	Target Entity
Contrastive Learning Method	usedIn	Pre Training Methods Method
Pre Training Methods Method	appliesTo	Dialog Understanding Tasks Task
Self Supervised Contrastive Loss Metric	enhances	SPACE 2 Method
SPACE 2 Method	evaluatedIn	DialoGLUE Benchmark Material
SPACE 2 Method	improves	Dialog Understanding Tasks Task
SPACE 2 Method	uses	Semantic Tree Structure Material