Struct contents reference from a non-struct array object.

I'm trying to access content of Data struct but I get this error I tried Data(bouts_plot) but I got error as well

        occupancy_filepath = [participant_folder];
        raw_occupancy_data = load(occupancy_filepath);

        bouts_plot = raw_occupancy_data.Data.bouts_plot;

[James Tursa]

What are the variable classes? E.g.,

class(raw_occupancy_data.Data)