Who can explain extrinsic.M.RM.E.W.cfg column 2-4 in [GENERAL] section

[xiekunwhy]

Hi,

Why extrinsic.M.RM.E.W.cfg has one more column before extrinsic columns, and what column 2-4 means? Why other extrinsic.cfg files have one column less than extrinsic.M.RM.E.W.cfg before extrinsic columns?

Also appear here (https://vcru.wisc.edu/simonlab/bioinformatics/programs/augustus/docs/tutorial2015/prediction.html#extr)

Best, Kun