Check box group as child table in DB publishing

I’ve successfully managed to get separate values out from a checkbox group using the following binding:

$child[0].CHARACTERISTIC - $sys.item.getProperty(“rx:characteristics”).Values

But I don’t want the values I want the text labels for each of the saved numeric values, which are in Keyword (eg happy - 1, sad - 2 etc).

Hopefully some skilled person can suggest an elegant way of modifying my binding to do this, incorporating getChoiceLabel???