<human>:  What is the name of the famous photograph by Dorothea Lange?
<bot>: The name of the photograph is Migrant Mother. It was taken by Dorothea Lange in 1936. The photograph depicts a mother and her children, who were living in a migrant camp in California. The photograph is famous because it was taken during the Great Depression, and the image of the mother and children is considered to be a representation of the hardships that many people faced during that time.