Complex sentence: For the average family, dinner is the one meal of the day where everyone can be gathered, due to the pressures of the modern life where both parents are likely to work, and the children are in school or pre-school institutions.
Split into simpler sentences: For the average family, dinner is the one meal of the day where everyone can be gathered. Due to the pressures of the modern life where both parents are likely to work, and the children are in school or pre-school institutions.