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Anchor text: Airplane Crash at the Lick Observatory

Wikipedia: Lick Observatory

Anchor text: The Lick Observatory A-17A

Wikipedia: Lick Observatory

Wikipedia: Pan Am Flight 1104

Anchor text: The Shadow Mountains B-50D

Wikipedia: List of accidents and incidents involving military aircraft (1950–1954)

Anchor text: Exploring the crash site of B-18A (serial number 37-498)

Wikipedia: Twin Sisters (California)