Hi Steve, this question is coming up quite frequently at the moment.
A lot of companies have been using what appears to be a ranged address (i.e. 113-115 Quincy St) for this as well and ranged addresses don't formally exist despite what might be written on the side of a building - there are hyphenated addresses in Hawaii, but they are not ranges.
We treat each address (either a primary address or secondary address) on it's own, discreetly. And we give each one a pbKey, and then we relate them together using a new product called "pbKey Genealogy".
As standard if you take your two examples: 113 & 115 Quincy St would standardize, match and geocode to 113 Quincy St and 113 A&B Georgia Ln would standardize, match and geocode to 113 A Georgia Ln.
So the way to get each individual address point is to write a parses (in spectrum or not) that converts:
113 & 115 Quincy St to 113 Quincy St AND 115 Quincy St
113-115 Quincy St to 113 Quincy St AND 114 Quincy St AND 115 Quincy St
Another approach might be to use Genealogy, go from 113 Quincy St and work out the building or parcel then return all the addresses in either that building or the parcel. These are the features of Genealogy.
I can demonstrate this to you on a call if you need Steve.
Mike