Complex sentence: The Chinatown in Victoria, British Columbia is the oldest Chinatown in Canada and second in age only to San Francisco's in North America, with its beginnings in the mass influx of miners from California to what is now British Columbia in 1858.
Split into simpler sentences: The Chinatown in Victoria, British Columbia is the oldest Chinatown in Canada and the second oldest in North America after San Francisco's. Victoria's Chinatown had its beginnings in the mid-nineteenth century in the mass influx of miners from California to what is now British Columbia in 1858.