1) The assassination of Archduke Franz Ferdinand of Austria in 1914 triggered the start of World War I.

2) A group of flamingos is called a "flamboyance."

3) The Industrial Revolution led to significant urbanization, as people migrated from rural areas to cities in search of employment in factories.

4) The recent social and political movements advocating for LGBTQ+ rights have resulted in significant advancements, including the legalization of same-sex marriage in many countries and increased visibility and acceptance of LGBTQ+ individuals.