The Seoul Sausage truck is inviting everyone to come out to support as they try to advance to the next round.
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According to their Instagram, they'll be filming at 34 Ellis Street, near Union Square, until 6 p.m.
The winner of the "Great Food Truck Race" will take home $50,000.
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The show is hosted by Bay Area chef Tyler Florence, who owns San Francisco's Wayfare Tavern.