Historical clue formulations

• Late marathoner Waitz — 2011-05-31
• Gregor's sister in "The Metamorphosis" — 2011-02-26
• ___ Waitz, nine-time New York City Marathon winner — 2007-07-20
• Marathoner Waitz — 2005-06-29
• Marathoner Waitz — 2004-02-14
• Marathon legend Waitz — 2000-01-16