Remove duplicate claims

fever.py

@@ -46,7 +46,6 @@ class FeverConfig(datasets.BuilderConfig):
 
 class Fever(datasets.GeneratorBasedBuilder):
     """Fact Extraction and VERification Dataset."""
-
     BUILDER_CONFIGS = [
         FeverConfig(
             name="v1.0",
@@ -134,14 +133,21 @@ class Fever(datasets.GeneratorBasedBuilder):
         ),
     ]
 
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.seen_claims= set()
+
     def _info(self):
-        if self.config.name == "wiki_pages":
+        if 
+        config.name == "wiki_pages":
             features = {
                 "id": datasets.Value("string"),
                 "text": datasets.Value("string"),
                 "lines": datasets.Value("string"),
             }
-        elif self.config.name == "v1.0" or self.config.name == "v2.0":
+        elif 
+        config.name == "v1.0" or 
+        config.name == "v2.0":
             features = {
                 "id": datasets.Value("int32"),
                 "label": datasets.ClassLabel(names=["REFUTES", "SUPPORTS"]),
@@ -152,10 +158,13 @@ class Fever(datasets.GeneratorBasedBuilder):
                 "evidence_sentence_id": datasets.Value("int32"),
             }
         return datasets.DatasetInfo(
-            description=self.config.description,
+            description=
+            config.description,
             features=datasets.Features(features),
-            homepage=self.config.homepage,
-            citation=self.config.citation,
+            homepage=
+            config.homepage,
+            citation=
+            config.citation,
         )
 
     def _split_generators(self, dl_manager):
@@ -187,6 +196,10 @@ class Fever(datasets.GeneratorBasedBuilder):
                         continue
 
                     claim = data["claim"]
+                    if claim in self.seen_claims:
+                        continue
+                    else:
+                        self.seen_claims.add(claim)
                     evidences = data.get("evidence", [])
                     if len(evidences) > 0:
                         for i in range(len(evidences)):