Add logic with concatenation parents data

[MargoWM]

Business context:
We need to have description of parents who apply for decision. As a description we have to insert:

• parent's/parents's names
• thier addres

Because of that is should looks different if there's one or two person who apply for decision. Moreover, we have take into account that parents can have same/different address. We don't need duplicate that address.
So we should consider situation:

1. rodzic 1 + adres
2. rodzic 1 i rodzic 2 + adres
3. rodzic 1 + adres i rodzic 2 +adres

Because of that we need to implement some logic to concatenate that information.