How to specify a spreadsheet column as an input

When configuring a Phantom, you might have wondered how this field works:

When you give Phantombuster a spreadsheet as an input, its multiple columns each have a name:

The names are NOT the letters, but the first row's strings. 

If you don't specify anything, Phantombuster will take the first column as its input source.

However, if you want the input to be the 5th column, followerCount for example, you should let Phantombuster know this way:

Be careful, this field is quite sensitive!