How can I use previously created concept sets in a new query?

After creating an inital dataset using the Cohort and Dataset Builder Tools, the workbench autogenerates a SQL query and exports it to a notebook of your choosing. The code generates a dataframe as well as a list of concept ids. You can save these concept ids and use them in any other query you create directly within a notebook. This tutorial in the workbench will guide you through the process.