Question: The Imperator-class ocean liners were a series of three ocean liners designed for the Hamburg America Line, which included the RMS Majestic, originally launched in 1914 as the SS what?
Sentence (from "Imperator-class ocean liner"): The "Imperator" class ocean liners were a series of three ocean liners designed for the Hamburg America Line, commonly known as "HAPAG".
Relevant evidence: Yes