Simplify the following text for a Grade 13 native English-speaking person.
Original: It was popularized by John Harvey Kellogg at the Battle Creek Sanitarium , where it was used both orally and in enemas , and later by Armenian immigrants Sarkis and Rose Colombosian , who started `` Colombo and Sons Creamery '' in Andover , Massachusetts in 1929 .
Simplified: Yoghurt was first brought to the United States by Armenian immigrants Sarkis and Rose Colombosian , who started `` Colombo and Sons Creamery '' in Andover , Massachusetts in 1929 .