Introduction:
Thank you very much for this great topic. I'd like to talk about Melinda Gates, a well-known philanthropist and co-founder of the Bill and Melinda Gates Foundation.

Who this person is:
Melinda Gates is an American philanthropist, businesswoman, and global advocate for women and girls. She was born in Dallas, Texas in 1964 and completed her education in computer science and economics. She worked for Microsoft as a marketing manager before co-founding the Bill and Melinda Gates Foundation with her ex-husband, Bill Gates. Melinda Gates is one of the most powerful and influential women in the world who has contributed a lot to society through her charity work.

What this person has done:
Melinda Gates has devoted her life to philanthropic work and has made significant contributions to improving the lives of women and girls all over the world. She has worked tirelessly to promote gender equality, empower women and girls, and provide access to healthcare and education for all. She has also played a key role in the fight against global poverty and has been a vocal advocate for improving public health.

Why this person is well known: 
Melinda Gates is well-known for her philanthropic work and has been recognized for her contributions to society. She has been listed among the world's most powerful women by Forbes magazine and has received numerous awards for her work, including the Presidential Medal of Freedom, the highest civilian honor in the United States.

And explain why you admire this person:
I admire Melinda Gates for her dedication and commitment to improving the lives of women and girls all over the world. Her work has had a positive impact on millions of people, and she has used her influence and resources to make a difference in the world. Her philanthropic efforts are truly inspiring, and I believe that she is an excellent role model for others who want to make a positive impact on society.