Complex sentence: There they established mercantile contacts and began a series of trading trips back and forth over the Santa Fe Trail which resulted, in 1832, in a partnership with Ceran St. Vrain, another trader from St. Louis, called Bent & St. Vrain Company.
Split into simpler sentences: There they established mercantile contacts and began a series of trading trips back and forth over the Santa Fe Trail. In 1832, he formed a partnership with Ceran St. Vrain, another trader from St. Louis, called Bent & St. Vrain Company.