Q: This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.
During the Middle Ages, shipbuilding became an important industry for the town. Henry V's famous warship HMS Grace Dieu was built in Southampton. Walter Taylor's 18th century mechanisation of the block-making process was a significant step in the Industrial Revolution. From 1904 to 2004, the Thornycroft shipbuilding yard was a major employer in Southampton, building and repairing ships used in the two World Wars.
A:
What skilled trade was a central industry for Southampton in the Middle Ages?