Update README.md

README.md

@@ -106,7 +106,7 @@ language:
 - `title` (`str`): title of a Wikipedia article, （未 NFKC正規化）
 - `context` (`str`): a concatenation of the title and paragraph, （未 NFKC正規化）
 - `question`(`str`): question, （未 NFKC正規化）
-- `answers`(`dict{answer_start(int), text(str)}`): a set of answers
-  - start position (character index)
-  - answer text, （未 NFKC正規化）
+- `answers`(`dict{answer_start: list(int), text: list(str)}`): a list of answers
+  - answer start positions (character index)
+  - answer texts, （未 NFKC正規化）
 - `is_impossible`(`bool`): all the values are false