Task: Text Simplification
Input (English): parts of europe , including much of scandinavia , never adopted many feudal institutions , including serfdom.
Output (English): parts of europe , including much of scandinavia , never take care of many feudal institutions -lrb- denoting the system of feudalism -rrb- , including serfdom -lrb- the place where the serfs , the lowest social class of the feudal society lived -rrb-.