Question: The Nakajima B6N "Tenzan", was the Imperial Japanese Navy's standard carrier-borne torpedo bomber during the final years of which event, an aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft? 
Sentence (from "Nakajima B6N"): Due to its protracted development, a shortage of experienced pilots and the United States Navy's achievement of air superiority by the time of its introduction, the B6N was never able to fully demonstrate its combat potential.
Relevant evidence: No