Complex sentence: "The Northwest" is home to over 10 million citizens, and is sometimes referred to as the "the Pacific Northwest" (abbreviated PNW or PacNW) is often used to mean Oregon and Washington and sometimes Idaho, northwestern Montana and northern California.
Split into simpler sentences: The Northwest is home to over 10 million citizens, and is sometimes referred to as the "the Pacific Northwest" (abbreviated PNW or PacNW). This term is often used to mean Oregon and Washington and sometimes Idaho, northwestern Montana and northern California.