Can anyone please help with a research paper on sebastiano del piombo?

I need a issue/problem that sebastiano del piombo went through with the artist raphael, and Michaelangelo. Its for a research paper that i just cant figure out how to start. the intro needs to state the issue or problem and give details as to how it got to that point (of the issue). and the bodie paragraphs each need to state a different person and 5th is my conclusion of course but a start would be a great help. please. thank you