1) The word "pizza" contains two vowels: I and A.

2) Serena Williams, an American tennis player, has won a total of 23 Grand Slam singles titles, making her one of the most successful players in the history of the sport.

3) Insurance policies often contain exclusions, which are specific events or circumstances that are not covered by the policy.

4) The Mona Lisa, painted by Leonardo da Vinci, is one of the most famous and valuable artworks in the world.