Splitting CSV into multiple CSVs by unique combination of two columns

Hi, I’m new to KNIME and was hoping to build this with some information online but I am need of a little help!

I’d like to separate a CSV file into multiple CSVs based on a the combination of perils and regions.

For example, I have columns Loss, Peril, Region and I’d like to split the CSV into 4 files (US windstorm, EU windstorm, US earthquake and US fire).

My current workflow looks like this:

My idea was to do the following but haven’t correctly created it in practice:

1. Read in CSV

2. Group by Region, Peril

3. Group Loop Start (filtered by Region and Peril)

4. CSV writer - was hoping to dynamically create file names and export

5. End Loop