Detailed Instructions: In this task, you're given a statement, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.
Q: Context: In the acknowledgments of Emperor Henry III in 1045, the village of Hackelingen was mentioned. Frederick I Barbarossa acknowledged the grants to the village in 1173. Link Information: Frederick Barbarossa (, ; 1122 10 June 1190), also known as Frederick I, was the Holy Roman Emperor from 2 January 1155 until his death. Question: Of the emperors who mentioned the village in 1045 and 1173, whose reign lasted longest?
A:
Answer: Frederick I