Complex sentence: The vegetarian sausage without a bun is much more common from the early 20th century, for example the 1913 Indianapolis (Indiana) Star 15 June 8/1 mentions someone who "says he has lived on his vegetarian sausage almost exclusively".
Split into simpler sentences: The vegetarian sausage without a bun is much more common from the early 20th century. For example, the 1913 "Indianapolis (Indiana) Star" of 15 June (8/1) mentions someone who "says he has lived on his vegetarian sausage almost exclusively".