Handle lagging SPADL features for first actions in games/periods about socceraction

[probberechts]

I wonder whether XGBoost is able to learn automatically that the preceding actions are irrelevant for a pass when the previous action was a goal or when the period changed since the previous action. Similarly, can XGBoost learn that the two preceding actions are irrelevant on free kicks, corners, and goal kicks? That would be an interesting experiment.

If XGBoost is not able to learn that, I think it would be best to include a separate action type for restarts (kick-offs and drop-balls). If you assign a missing value, XGBoost will impute them and that might lead to strange values as well.

[RobWHickman]

yeah, I'd be interested to read if anyone wanted to look into it. I think on the whole it doesn't really matter because actually those make up such a small percentage (let's say 50 free kick + corners + kick offs is still ~2.5% of all actions captured by SPADL) so don't mind if you want to close the issue