1) The word "yesterday" contains three vowels: E, A, and A.

2) The development of voice recognition technology has led to the widespread use of virtual assistants such as Siri, Alexa, and Google Assistant.

3) The Cuban Missile Crisis in 1962 brought the United States and the Soviet Union to the brink of nuclear war during the Cold War.

4) The Brexit process, initiated by the United Kingdom's referendum in 2016, led to the country's withdrawal from the European Union in 2020, marking a significant political and economic change for both the UK and the EU.