Historical clue formulations

• German avenue — 2016-09-29
• Bonn boulevard — 2015-05-15
• 13-Down, in Dresden — 2014-02-09
• Thüringen thoroughfare — 2013-04-11
• Automobil site — 2010-10-30
• Berlin boulevard — 2010-05-28
• German street — 2010-03-21
• German thoroughfare — 2005-01-18
• Berlin boulevard — 2004-09-01
• Bonn boulevard — 1999-09-12
• Road in the Ruhr — 1996-02-16
• Mainz street — 1994-03-05