A more thorough explanation:

Definition: Lex Calpurnia is a Roman law that extends the lex Silia by establishing procedures to recover goods other than money. This law affects the actiones legis.

Example: Let's say that a person borrowed a horse from another person, but did not return it. The owner of the horse can use the procedures established by the lex Calpurnia to recover their property.

This example illustrates how the lex Calpurnia allows for the recovery of goods other than money, such as the horse in this case.