What are the two data structures JSON uses?

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1. #struct
2. #amongst
3. #supports
4. #collection
5. #array
6. #support
7. #record
8. #value
9. #different
10. #structures
11. #table
12. #dictionary
13. #languages
14. #object
15. #programming
16. #structure
17. #pairs
18. #names
19. #widely
20. #associative
21. #keyed