Assertion: yogurt's bacteria | /r/ObjectUse | used in yogurt cultures
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Source sentences:
text: While references to the health-promoting properties of yogurt date back to 6000 BC in Indian Ayurvedic scripts, it was not until 1905, when a Bulgarian medical student, Stamen Grigorov, discovered Bacillus bulgaricus (now Lactobacillus bulgaricus), a lactic acid bacteria that is still used in yogurt cultures today.