Sentence:The [e1]synthesis[/e1] was developed from his own [e2]work[/e2] and that of M. C. Read in northern and Northeastern Ohio, G. K. Gilbert and N. H. Winchell in Northwestern Ohio, and Edward Orton in Southwestern Ohio.
 e1: synthesis. 
 e2 : work.
Answer: Entity-Origin(e1,e2)