I see only one column mapping. Shouldn't there be two?

[blazgocompany]

I go to the HuggingFace AutoTrain Space and see:

So I'm not sure weather this is input, or output, or input+output and if that is the case, what format should it be in? Random? Do I need to use the same as the models I/O format? How do I find out the models I/O format?