Sort column by last word in cell
This must be such a common query that I find it hard to believe I can't find a solution more current than 2007. I have been given an Excel spreadsheet with names and addresses; it opened with no problem in Numbers 3 (on an iMac under Yosemite). I want to know how I can easily sort it by surname (i.e. the last word in the address column). The advice given in 2007 refers to a Numbers script folder that no longer exists and an Applescript menu that isn't there.
iMac (Retina 5K, 27-inch, Late 2014), OS X Yosemite (10.10.2)