Riverside County and San Bernardino County to the north form this metro area. Like many such metro areas in the Southwest, it extends far into uninhabited desert areas, in this case east through the Mojave Desert to the Nevada/Arizona border. Larger than nine U.S. states, it is often referred to as the Inland Empire.
I agree with tchrist that the word doctor in doctor appointment is a noun (attributive noun I believe), although the definition of an attributive noun is a noun used as an adjective, so maybe it's just semantics at some point.
(August 2009) (Learn how and when to remove this template message) Under the Appointments Clause of the United States Constitution and law of the United States, certain federal positions appointed by the president of the United States require confirmation (advice and consent) of the United States Senate.