I think you are in the wrong place here. But I could give you a starting tip
[[QPNo speakers]VP have [QPa disadvantage]] [AdvP in their fundamental ability [AdVP to function cognitively and expressively]] [AdVP as a result] [AdvP of the variety [AdvP of the language]] [DP that [[PRN they] VP acquire.]]"
The basic PPs are locative adverbs which, through their ability to take objects can be extended to larger adverbials. I see little point in defining PPs as something different to AdVP. Anything starting 'that...' may be labelled a CP, but 'that' is fundamentally a demonstrative pronoun.
Student or Learner