see if this works?

nba_tracking_data_15_16.py

@@ -85,9 +85,7 @@ class NbaTracking(datasets.GeneratorBasedBuilder):
                 #         "jersey": datasets.Value("string"),
                 #         "position": datasets.Value("string")
                 #     })
-                "moments": datasets.Sequence(
-                    # question, how to indicate lists of lists of different types
-                    {
+                "moments": {
                         "quarter": datasets.Value("int64"),
                         "game_clock": datasets.Value("float32"),
                         "shot_clock": datasets.Value("float32"),
@@ -106,9 +104,8 @@ class NbaTracking(datasets.GeneratorBasedBuilder):
                         #     }
                         # )
                     }
-                )
-            }
-        )
+                }
+            )
         
         return datasets.DatasetInfo(
             # This is the description that will appear on the datasets page.