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- Table R Table RZ (n-m) Table Z
- ------- ----------------- ---------
- R1 R1 | Z1 Z1 | "A"
- R2 R1 | Z2 Z2 | "B"
- R3 R2 | Z1 Z3 | "C"
- R4 R2 | Z3 Z4 | "D"
- ... R3 | Z1 ...
- ... R3 | Z2 ...
- ... R3 | Z4 ...
- ID of R | Name of Z
- --------------------
- R1 | "A,B"
- R2 | "A,C"
- R3 | "A,B,D"
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