Premise: The Phoenix Metropolitan Area -- often referred to as the Valley of the Sun , the Salt River Valley or Metro Phoenix -- is a metropolitan area , centered on the city of Phoenix , that includes much of the central part of the U.S. State of Arizona . The Salt River Valley is an extensive valley on the Salt River in central Arizona , which contains the Phoenix Metropolitan Area .
Hypothesis: Salt River Valley is a river valley that contains the Phoenix metropolitan area.
Label: ENTAILMENT