Complex sentence: Slavery ended in Jamaica on 1 August 1834, with the passing of the British Emancipation Act, which eventually led to full emancipation on 1 August 1838 after four years of apprenticeship--the date on which former slaves became free to choose their employment and employer.
Split into simpler sentences: Slavery ended in Jamaica on 1 August 1834, with the passing of the British Emancipation Act which, after four years of "apprenticeship", led to full emancipation on 1 August 1838. This was the date on which former slaves became free to choose their employment and employer.