Sentence:Those of us resolving to lead a lower-carbon life in 2010 could do worse than acquire a copy of Prashant Vaze's new [e1]book[/e1], The Economical Environmentalist, in which the [e2]author[/e2] picks over the fine details of his life.
 e1: book. 
 e2 : author.
Answer: Product-Producer(e1,e2)