Update phrase_retrieval.py

phrase_retrieval.py

@@ -85,11 +85,11 @@ class PhraseRetrieval(datasets.GeneratorBasedBuilder):
                     "title": datasets.Value("string"),
                     "context": datasets.Value("string"),
                     "question": datasets.Value("string"),
-                    "answers": datasets.features.Dict(
+                    "answers": datasets.Sequence(
                         {
-                            "text": datasets.Sequence(datasets.Value("string")),
-                            "answer_start": datasets.Sequence(datasets.Value("int32")),
-                        }
+                            "text": datasets.Value("string"),
+                            "answer_start": datasets.Value("int32"),
+                        },
                     ),
                 }
             ),
@@ -129,6 +129,9 @@ class PhraseRetrieval(datasets.GeneratorBasedBuilder):
             for example in pic_pr["data"]:
                 title = example.get("title", "")
 
+                answer_starts = [answer["answer_start"] for answer in example["answers"]]
+                answers = [answer["text"] for answer in example["answers"]]
+
                 # Features currently used are "context", "question", and "answers".
                 # Others are extracted here for the ease of future expansions.
                 yield key, {
@@ -137,8 +140,8 @@ class PhraseRetrieval(datasets.GeneratorBasedBuilder):
                     "question": example["question"],
                     "id": example["id"],
                     "answers": {
-                        "answer_start": example["answers"]["answer_start"],
-                        "text": example["answers"]["text"],
+                        "answer_start": answer_starts,
+                        "text": answers,
                     },
                 }
                 key += 1