Update README.md

README.md

@@ -17,7 +17,7 @@ Accurate and consistent definitions of terms in financial regulations are import
 | Securities and Exchanges    |    13 | SEC                  |
 
 # Metrics
-BERT score is used.
+We use BERTScore to evaluate the generations, measuring the semantic similarity between the LLM-generated answers and the provided definitions. It converts both reference and candidate sentences into contextual embeddings using transformer-based models like BERT. The semantic alignment is quantified through cosine similarity between these embeddings, providing a metric of how closely the model's responses match the expected semantic content of the definitions.
 
 # Related tasks
 Regulations Challenge at COLING 2025: https://coling2025regulations.thefin.ai/home