Complex sentence: This postcard of the early 20th century on the topic of threshing, a step in grain preparation after harvesting and before winnowing, is used to illustrate the article about The Harvest Threshing, a painting by Albert Gleizes.
Split into simpler sentences: This postcard of the early 20th century represents the process of threshing, a step in grain preparation after harvesting and before winnowing. It is used to illustrate the article about The Harvest Threshing, a painting by Albert Gleizes.