Update README.md

README.md

@@ -42,7 +42,7 @@ The dataset was originally collected to call balls and strikes using neural netw
 ## Dataset Structure
 
 <!-- This section provides a description of the dataset fields, and additional information about the dataset structure such as criteria used to create the splits, relationships between data points, etc. -->
-The dataset is structured as a .tar file of all the videos. The labels are contained in three .csv files (train, val, test). The .csvs are structured as follows:
+The dataset is structured as a .tar.xz file of all the videos. The labels are contained in three .csv files (train, val, test). The .csvs are structured as follows:
 
 date	pitch	mph	spin_rate	pitcher	batter	zone	count	inning	pitch_result	video_link	filename	video_length
 2018-06-15	FF	94.8	2256	Gausman, Kevin(R)	Shuck, JB(L)	6	2-2	Top 2	Called Strike	https://baseballsavant.mlb.com/sporty-videos?playId=...	clip_21926.mp4	200