fixed bug in sequence feature schema definition

phantom-wiki.py

@@ -103,14 +103,14 @@ class PhantomWiki(datasets.GeneratorBasedBuilder):
                     "id": datasets.Value("string"),
                     "question": datasets.Value("string"),
                     "intermediate_answers": datasets.Value("string"),
-                    "answer": datasets.Sequence("string"),
+                    "answer": datasets.Sequence(datasets.Value("string")),
                     "prolog": datasets.Features(
                         {
                             "query": datasets.Value("string"),
                             "answer": datasets.Value("string"),
                         }
                     ),
-                    "template": datasets.Sequence("string"),
+                    "template": datasets.Sequence(datasets.Value("string")),
                     "type": datasets.Value("int64"),  # this references the template type
                     "difficulty": datasets.Value("int64"),
                 }
@@ -168,23 +168,11 @@ class PhantomWiki(datasets.GeneratorBasedBuilder):
         with open(filepath, encoding="utf-8") as f:
             for key, data in enumerate(json.load(f)):
                 if self.config.name == "corpus":
-                    yield key, {
-                        "title": data["title"],
-                        "article": data["article"],
-                        # "facts": data["facts"], # TODO
-                    }
+                    yield key, data
                 elif self.config.name == "question-answer":
-                    yield key, {
-                        "id": data["id"],
-                        "question": data["question"],
-                        "intermediate_answers": data["intermediate_answers"],
-                        "answer": data["answer"],
-                        "prolog": data["prolog"],
-                        "template": data["template"],
-                        "type": data["type"],
-                        "difficulty": data["difficulty"],
-                    }
+                    yield key, data
                 elif self.config.name == "database":
+                    # NOTE: Our schema expects a dictionary with a single key "content"
                     yield key, {
                         "content": data,
                     }