Historical clue formulations

• Onetime colleague of Ebert — 2013-11-05
• Half of an old film duo — 2012-09-16
• Film critic Gene — 2008-05-26
• Ebert's former partner — 2001-05-08
• Half a TV duo — 1997-12-26
• Ebert's co-critic — 1995-06-15