Sentence:The cappuccino's climate change impact depends on whether the cafe is double-glazed, the decisions the staff and I take to get there, the diet of the methane-producing [e1]cow[/e1] that produced the [e2]milk[/e2] and the source of power for the espresso machine.
 e1: cow. 
 e2 : milk.
Answer: Product-Producer(e2,e1)