Complex sentence: A law adopted by the state in 1862 required all ethnic minorities to pay a $5 annual tax, and interracial marriage was prohibited by law between (approximately) 1861 and 1951.
Split into simpler sentences: A law adopted by the state in 1862 required all ethnic minorities to pay a $5 annual tax. Interracial marriage was prohibited by law between (approximately) 1861 and 1951.