Complex sentence: Starting in about 1000 CE terminal Late Woodland groups in the Middle Ohio Valley adopted maize agriculture and began settling in small, year-round nuclear family households of no more than 40 to 50 individuals.
Split into simpler sentences: Starting in about 1000 CE, terminal Late Woodland groups in the Middle Ohio Valley adopted maize agriculture. They began settling in small, year-round nuclear family households and settlements of no more than 40 to 50 individuals.