Question: Of Thee I Sing: A Letter to My Daughters is a children's book by former United States President Barack Obama, the stories of thirteen Americans are told in the book, including Jackie Robinson, who was an American professional baseball second baseman who became the first African American, to play in which organization?
Sentence (from "Of Thee I Sing (book)"): The stories of thirteen Americans are told in the book: George Washington, Abraham Lincoln, Martin Luther King, Neil Armstrong, Sitting Bull, Cesar Chavez, Billie Holiday, Maya Lin, Albert Einstein (who was born in Germany), Georgia O'Keeffe, Jackie Robinson, Helen Keller, and Jane Addams."
Relevant evidence: Yes