Level 1
Who owns it
Sin points back to the subject. Hans and hennes point to someone else.
same subject owns it
Kari takes her own bag.
someone else owns it
Kari takes another woman's bag.
First identify the subject
Use sin/si/sitt/sine when the subject owns the item. Use hans/hennes/deres when the owner is someone else mentioned in the context.
Examples
Kari tar veska si.
Kari takes her own bag.
Kari tar veska hennes.
Kari takes another woman's bag.