Sentence:  Firstly, we want to apply a theory that allows us to handle the question of multiple <WSD>holderships</WSD>, i.e. the circumstance in which one person can be described as holder of more than one of the aforementioned aspects, for instance as holder of rights and knowledge and interest. 
Meaning of the word marked with <WSD> tags:  The state of being a holder; the condition of having rights to something.