Complex sentence: At sixteen Benjamin became an apprentice to his father, he joined the Worshipful Company of Tallow Chandlers in 1837 and became a Freeman of the City of London in 1838.
Split into simpler sentences: At sixteen Benjamin became an apprentice to his father. He joined the Worshipful Company of Tallow Chandlers in 1837 and became a Freeman of the City of London in 1838.