Update keyphrase_extraction.py

keyphrase_extraction.py

@@ -39,4 +39,5 @@ def extract_sentences_with_obligations(text):
         if any(any(word in kp.lower() for word in obligation_words) for kp in ranked_keyphrases):
             obligation_sentences.append(sentence)
 
-    return obligation_sentences
+    # Join the sentences into a single string
+    return ' '.join(obligation_sentences)