From here we could export a list of Element IDs to CSV, make a Selection Set by Elements using Clockwork, or use one of the Select in Revit nodes.
As you can see, to make a string list in a code block, you need to enclose list in curly brackets, divide with commas and use quotation marks around the entries themselves. More about code blocks at: http://dynamobim.com/cbns-for-dummies/
