STT_PC : [ "Publishing year", "Channel", "Auidio Quality", "Country", "Gender", "Age Group", "uploaded"]
STT_TT : [ "Teacher", "Topic", "Audio Duration", "Group", ]
STT_MV : [ "Name of the movie", "Subtitle", "Repo Link", "Duration", ]
STT_NS : [ "Date", "Time ", "Mic/Phone", "Location ", "Topic ", "ID", "Speaker ID", "Gender", "Audio Duration", "Group", "Pecha Tools", "A Short Scenario ", "Sum", "Gender" ]
STT_AB : [ "ID", "Collection", "Book Title", "Category", "Duration", "Recorder", "pecha.tools", "Music", "Book URL" ]
None
Read the docs here.