Update README.md

README.md

@@ -83,12 +83,12 @@ Description of the dataset columns:
 | question_text                | str         | The question to answer                                                                                           |
 | document_plaintext           | str         | The context, a Wikipedia paragraph that might or might not contain the answer to the question                    | 
 | annotations["answer_start"]  | list[int]   | The char index in 'document_plaintext' where the answer starts. If the question is unanswerable - [-1]  |
-| annotations["answer_text"]   | list[str]   | The answer, a span of text from 'document_plaintext'. If the question is unanswerable - an empty list            |
+| annotations["answer_text"]   | list[str]   | The answer, a span of text from 'document_plaintext'. If the question is unanswerable - ['']            |
 
 
 **Notice:** If the question is *answerable*, annotations["answer_start"] and annotations["answer_text"] contain a list of length 1  
 (In some variations of the dataset the lists might be longer, e.g. if more than one person annotated the instance, but not in our case). 
-If the question is *unanswerable*, annotations["answer_start"] will have "-1", while annotations["answer_text"] contain an empty list of length 0.
+If the question is *unanswerable*, annotations["answer_start"] will have "-1", while annotations["answer_text"] contain a list with an empty sring.
 
 
 ## Useful stuff