March 18 to Mac Rebennack in 7 Steps

1. March 18 is the birthday of George Plimpton
2. George Plimpton appears in Good Will Hunting
3. Good Will Hunting stars Robin Williams
4. Robin Williams sang Blow Me Down
5. Blow Me Down was written by Harry Nilsson
6. Harry Nilsson recorded Flash Harry
7. Flash Harry includes piano played by Mac Rebennack

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