Update README.md

README.md

@@ -227,7 +227,7 @@ def extract_keyphrases(examples):
 
 ## 📝 Evaluation Results
 
-One of the traditional evaluation methods is the precision, recall and F1-score @k,m where k is the number that stands for the first k predicted keyphrases and m for the average amount of predicted keyphrases.
+Traditional evaluation methods are the precision, recall and F1-score @k,m where k is the number that stands for the first k predicted keyphrases and m for the average amount of predicted keyphrases. In keyphrase generation you also look at F1@O where O stands for the number of ground truth keyphrases.
 The model achieves the following results on the Inspec test set: