Complex sentence: Picasso demonstrated extraordinary artistic talent in his early years, painting in a realistic manner through his childhood and adolescence; during the first decade of the 20th century his style changed as he experimented with different theories, techniques, and ideas.
Split into simpler sentences: Picasso demonstrated extraordinary artistic talent in his early years, painting in a realistic manner through his childhood and adolescence. During the first decade of the 20th century his style changed as he experimented with different theories, techniques, and ideas.