Complex sentence: He was the youngest son of John Gainsborough, a weaver in Suffolk, and, in 1740, left home to study art in London with Hubert Gravelot, Francis Hayman, and William Hogarth.
Split into simpler sentences: He was the youngest son of John Gainsborough, a weaver in Suffolk. He left home in 1740 to study art in London with Hubert Gravelot, Francis Hayman, and William Hogarth.