Complex sentence: According to census records, he was born in London and settled in Portsea, Portsmouth at the age of 20 which attracted many jews during the Napoleonic wars due to its commercial activity as a garrison and naval town.
Split into simpler sentences: According to census records, he was born in London and settled in Portsea, Portsmouth at the age of 20. Portsmouth attracted many jews during the Napoleonic wars due to its commercial activity as a garrison and naval town.