source: The Walnut Valley Unified School District is located in the Greater Los Angeles Area serving parts of the City of Walnut and parts of the city of Diamond Bar.
target: The Walnut Valley Unified School District is located in the Greater Los Angeles Area. The district serves parts of the City of Walnut. It also serves parts of the city of Diamond Bar.
references: The Walnut Valley Unified School District is located in the Greater Los Angeles Area. The district serves parts of the City of Walnut. It also serves parts of the city of Diamond Bar.