Historical clue formulations

• "___ Flow" (song by Enya) — 2023-10-22
• Colombia/Venezuela border river — 2023-09-25
• River with the second-largest discharge volume in the New World, after the Amazon — 2021-10-23
• Noted piranha habitat — 2018-10-24
• River that's home to the black spot piranha — 2016-10-06
• Home to 15-foot-long crocodiles — 2015-09-05
• River past Ciudad Bolívar — 2012-05-23
• Major Atlantic Ocean feeder — 2006-08-19
• Ciudad Bolívar is on it — 2006-01-07
• Part of the Venezuela/ Colombia border — 2003-12-21
• River to the Atlantic — 2003-02-28
• Puerto Ayacucho's river — 2002-12-08
• Venezuelan river — 1998-02-04
• Ciudad Bolivar's river — 1996-08-09
• Its chief port is Ciudad Bolivar — 1995-12-29
• Part of the Venezuela-Colombia border — 1995-10-27
• Colombia-Venezuela border river — 1995-06-02