Original: In the combination, you must combine any sections Entitled "History" in the various original documents, forming one section Entitled "History"; likewise combine any sections Entitled "Acknowledgements", and any sections Entitled "Dedications".
Simplified: In the combination, you must combine any sections named "History" in the various not changed documents, making one section named "History"; and combine any sections named "Acknowledgements", and any sections named "Dedications".