<human>: What is the difference between a'semi-detached house' and a 'duplex'?
<bot>: The main difference between a semi-detached house and a duplex is that a semi-detached house has two separate dwellings, while a duplex typically shares a common wall. Semi-detached houses usually have their own front doors and are considered to be single family homes, whereas a duplex may have only one entrance door or shared entrances. Additionally, semi-detached houses generally have more land than a duplex unit.