United States dollar
Deductions
- medium of exchange is for example United States dollar ⇐ (United States dollar is a medium of exchange), (is a is inverse of is for example)
- United States dollar is a medium of exchange ⇐ (currency is subclass of medium of exchange), (United States dollar is a currency)
- currency is for example United States dollar ⇐ (United States dollar is a currency), (is a is inverse of is for example)