Combining PhoBERT features with scores from an expanded Vietnamese SentiWordNet achieves F1 of 0.95 and 0.94 on two review datasets, but the lexicon expansion step is not fully defined.
SENTIWORDNET: A publicly available lexical resource for opinion mining
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Expanding Vietnamese SentiWordNet to Improve Performance of Vietnamese Sentiment Analysis Models
Combining PhoBERT features with scores from an expanded Vietnamese SentiWordNet achieves F1 of 0.95 and 0.94 on two review datasets, but the lexicon expansion step is not fully defined.