Simplify the following text for a Grade 5 native English-speaking person.
Original: Though the common wisdom is that a serf owned `` only his belly '' â '' even his clothes were the property , in law , of his lord â '' a serf might still accumulate personal property and wealth , and some serfs became wealthier than their free neighbors , although this was rather an exception to the general rule .
Simplified: A serf could get and keep property and money . Some serfs had more money and property than their free neighbors .