bug fix (take ["score"] from metric result)

logmetric.py

@@ -115,7 +115,7 @@ class LogMetric(evaluate.Metric):
 
     # Use minimum edit distance between two sentences
     def get_overall_similarity(self, sentence1, sentence2):
-        return self.sacrebleu_metric.compute(predictions=sentence1, references=sentence2)
+        return self.sacrebleu_metric.compute(predictions=sentence1, references=sentence2)["score"]
         
         # s1split = sentence1.split()
         # s2split = sentence2.split()