fix spits key error

app.py

@@ -1,5 +1,7 @@
 import requests
 from collections import Counter
+
+from fontTools.subset import subset
 from requests.adapters import HTTPAdapter, Retry
 import os
 import time
@@ -271,7 +273,7 @@ with gr.Blocks() as demo:
             }
         subsets: list[str] = list(info_resp["dataset_info"])
         subset = default_subset if default_subset in subsets else subsets[0]
-        splits: list[str] = info_resp["dataset_info"][subset]["splits"]
+        splits: list[str] = list(info_resp["dataset_info"][subset]["splits"])
         split = default_split if default_split in splits else splits[0]
         features = info_resp["dataset_info"][subset]["features"]
 
@@ -288,7 +290,6 @@ with gr.Blocks() as demo:
                 text_column_dropdown: gr.Dropdown(choices=text_features + nested_text_features, label="Text column name"),
                 nested_text_column_dropdown: gr.Dropdown(visible=False),
             }
-        logging.info(nested_text_features)
         if text_feature in nested_text_features:
             nested_keys = [feature_name for feature_name, feature in features[text_feature].items() if _is_string_feature(feature)]
             return {