On the west side of San Francisco, the streets running east-west follow a bit of a pattern. They seem to be alphabetical, starting in the middle of the Richmond and going south, across Golden Gate Park, and into the Sunset District. Except, there are some anomalies in the pattern. Most of the names seem to be Spanish, but not all, and most of the alphabet is represented, but not all. What's going on?

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This story was reported by Katrina Schwartz. Bay Curious is made by Katrina Schwartz, Christopher Beale and Olivia Allen-Price. Additional support from Jen Chien, Katie Sprenger, Maha Sanad, Ethan Toven-Lindsey and everyone on Team KQED.

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