Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: One of the greatest warships of the Middle Ages has been found buried in a river – after being spotted in an aerial photograph. The Holigost – or Holy Ghost – was the second of four 'great' ships built for Henry V's royal fleet. The 600-year-old vessel, which helped Henry V wage war on France, was spotted in the mud of the River Hamble in Hampshire by historian Dr Ian Friel. The wreck is in an area described as a medieval breaker’s yard, next to Henry’s flagship the Grace Dieu, which was identified in the 1930s. Historic England is taking steps to protect and investigate the vessel, which Dr Friel identified when he was revisiting documentary evidence for his new book, Henry V’s Navy.The Holigost - Holy Ghost - was one of four 'great' ships built for Henry VThe 600-year-old vessel is buried beneath mud in the River Hamble, HantsDr Ian Friel saw ship in photos of yard where Henry's Grace Dieu was foundHistoric England now taking steps to protect and investigate the shipwreck 
 Question:'In my opinion, further research leading to the rediscovery of the _ would be even more important than the identification of the Grace Dieu in the 1930s.

Holigost –