Historical clue formulations

• Vernacular much debated in the 1990s — 2016-06-10
• Controversial school language subject — 2013-02-15
• Vernacular that came into prominence in 1996 — 2008-08-14
• Controversial talk — 2004-11-11
• Controversial school subject — 1999-10-17
• Much-debated school subject — 1997-10-11