Question: De Dietrich Remeha, is one of Europe's biggest manufacturers and distributors of domestic and commercial water and space heating systems, in July 2009, when heavily laden with debt, which of Europe's largest manufacturers and distributors of domestic and commercial water and space heating systems, agreed to merge with them? 
Sentence (from "De Dietrich Remeha"): Headquartered in Apeldoorn in the Netherlands, it was founded in July 2004 after a merger between the Dutch firm Remeha, and the French firm De Dietrich Thermique.
Relevant evidence: No