User: Locate the classification of Picasso's work over time on the text, extract including the description and the period, and place them in a bullet list
Assistant: Blue Period (1901–1904)
Rose Period (1904–1906)
African-influenced Period (1907–1909)
Analytic Cubism (1909–1912)
Synthetic Cubism or Crystal Period (1912–1919)
Surrealism (mid-1920s)