Sure, here are 3 bullet points for each artist:

Marcel Duchamp:

* Widely regarded as one of the most important and influential artists of the 20th century
* Best known for his conceptual and provocative works, including "Fountain"
* Helped pave the way for movements such as Dada and Surrealism, and his influence can be seen in many later artists, including the Pop artists of the 1960s

Gerhard Richter:

* Considered one of the most important contemporary artists
* Known for his diverse range of styles and techniques, including photo-realistic paintings, abstract works, and installations
* Engages with issues of history, memory, and the relationship between images and reality in his works. His influence can be seen in many contemporary artists who work across different media and genres
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