KNIME data record: Telco Customer Churn Column description

Hello, is there a column description for the Telco Customer Churn record? (KNIME EXAMPLES Server under 50Applications/18Churn_Prediction.) (Image of files below)

For my scientific work it would be helpful to have a validated source for the meaning of the columns, I have already searched but unfortunately did not find anything.

I found a dataset on Kaggle that is called this, but unfortunately this is a different one (Telco Customer Churn | Kaggle)

The columns would be particularly important: Day Charge and Eve Charge for me.

Many thanks for your help.