Passage: At the time, formic acid was formed by the distillation of dead ants, and Döbereiner's ant bodies probably contained some plant matter. In 1840, the Scottish chemist John Stenhouse found that the same chemical could be produced by distilling a wide variety of crop materials, including corn, oats, bran, and sawdust, with aqueous sulfuric acid; he also determined an empirical formula of (C5H4O2). George Fownes named this oil furfurol in 1845 (from furfur - bran, and oleum). This name persisted prominently in the literature until 1901 when the German chemist Carl Harries deduced furfural's structure.Furfural remained relatively obscure until 1922, when the Quaker Oats Company began mass-producing it from oat hulls. Today, furfural is still produced from agricultural byproducts like sugarcane bagasse and corn cobs. The main countries producing furfural today are the Dominican Republic, South Africa and China.

Question: What part of corn is used today in the production of furfural?
corn cobs