Ok thanks, that makes sense! Is the same true for:
Jack is both a good student and a talented soccer player --> Are "both...and" also conjunctions or is "both" rather a predeterminer of both NPs?
I came across a few other things (I'm just reading a lot about syntax/NPs right now and am constantly thinking about NPs when reading sth). I hope I don't bother you.
7. Spend a day in the park, with flowers and green spaces. --> I'm not sure if "with flowers and green spaces" is a postmodifier of the NP "in the park" or an adverbial?
8. All our products are made of the best material, completed with the great work of our staff. --> Is "completed with the work of our staff" part of the NP "the best material"? I would say yes, but I'm confused because of the comma after materials (so it can't be a relative clause, right?).
9. A popular spot for the youth, the community center is a great place to hang out, organizing a wide range of activities throughout the year. --> the same question for this example: Is "organizing a wide range of activities throughout the year" part of the NP "a great place to hang out"?
10. This house has bigger windows than any other in the street. --> Is it right that "than any other in the street" is the postmodifier of the NP "bigger windows"?