It's a URL query string like this:
querystring=geog:2011WARDH&totals:false&dm/2011WARDH:E06000016,E12000004,E06000016&etc...
The geog field is extracted and returns 2011WARDH in this example. I want to extract E06000016,E12000004,E06000016 into a new area field. As you can see, they're prefixed with the 2011WARDH value from the geog field. This is not a fixed value, so I need it to vary within the regular expression as it varies within the geog field.
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