Complex sentence: He recruited Henry H. Rogers into his business, forming Charles Pratt and Company in 1867, and seven years later Pratt and Rogers agreed to join John D. Rockefeller's Standard Oil.
Split into simpler sentences: He recruited Henry H. Rogers into his business, forming Charles Pratt and Company in 1867. Seven years later, Pratt and Rogers agreed to join John D. Rockefeller's Standard Oil.