fix identifiers

NLVR2.py

@@ -121,8 +121,8 @@ class NLVR2Dataset(datasets.GeneratorBasedBuilder):
             for line in open(path).readlines():
                 ex = json.loads(line)
                 common_img_identifier = ex["identifier"].split("-")
-                left_img_identifier = f"{split_name-common_img_identifier[1]}-{common_img_identifier[2]}-img0.png"
-                right_img_identifier = f"{split_name-common_img_identifier[1]}-{common_img_identifier[2]}-img1.png"
+                left_img_identifier = f"{split_name}-{common_img_identifier[1]}-{common_img_identifier[2]}-img0.png"
+                right_img_identifier = f"{split_name}-{common_img_identifier[1]}-{common_img_identifier[2]}-img1.png"
                 left_image_path = str(os.path.join(images_path, left_img_identifier))
                 right_image_path = str(os.path.join(images_path, right_img_identifier))
                 record = {