SELECT [Person].[Address].[AddressLine1]
, [Person].[Person].[FirstName]
, [Person].[Person].[LastName]
FROM [Person].[BusinessEntityAddress] join [Person].[Address]
on [Person].[BusinessEntityAddress].[AddressID]=[Person].[Address].[AddressID]
JOIN [Person].[Person]
ON [Person].[Person].[BusinessEntityID] = [Person].[BusinessEntityAddress].[BusinessEntityID]
WHERE FirstName= 'Terri' AND LastName= 'Duffy'
--or using Alias makes it a lot cleaner and easier to read
SELECT PA.[AddressLine1]
, PP.[FirstName]
, PP.[LastName]
FROM [Person].[BusinessEntityAddress] PB
INNER JOIN
[Person].[Address] PA
ON PB.[AddressID] = PA.[AddressID]
INNER JOIN
[Person].[Person] PP
ON PP.[BusinessEntityID] = PB.[BusinessEntityID]
WHERE PP.[FirstName] = 'Terri'
AND PP.[FirstName] = 'Duffy'