Historical clue formulations

• "Walk ___" (1964 hit) — 2015-05-24
• "Walk ___" (1964 hit) — 2009-05-29
• "Walk ___" (Dionne Warwick hit) — 2007-05-03
• Hanging ___ a thread — 2007-04-25
• Dionne Warwick's "Walk___" — 1996-04-18