Complex sentence: Mikmoto was born the first son of an "udon" shop owner in Toba, Shima Province (present-day Mie prefecture), Mikimoto left school at the age of 13 and sold vegetables to support his family.
Split into simpler sentences: Mikmoto was born the first son of an "udon" shop owner in Toba, Shima Province (present-day Mie prefecture). He left school at the age of 13 and sold vegetables to support his family.