Sentence:  Amtrak's train No. 5, then known as the 'San Francisco Zephyr', westbound on Southern Pacific tracks, climbing the eastern side of the Donner Pass, at <WSD>Andover</WSD>, California, on 20th June 1974. 
Meaning of the word marked with <WSD> tags:  A former settlement in (Placer County), California, USA.