In this task, you're given a passage, 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: Passage: R. S. Thomas was born in Cardiff, the only child of Thomas Hubert and Margaret (nee Davies). The family moved to Holyhead in 1918 because of his father's work in the Merchant Navy. He was awarded a bursary in 1932 to study at the University College of North Wales, where he read Latin. In 1936, after he completed his theological training at St. Michael's College, Llandaff, he was ordained as a priest in the Anglican Church in Wales. From 1936 to 1940 he was the curate of Chirk, Denbighshire, where he met his future wife, Mildred "Elsi" Eldridge, an English artist. He subsequently became curate-in charge of Tallarn Green, Flintshire, as part of his duties as curate of Hanmer.
Link Information: none Question: What was the population of Holyhead the year that R. S. Thomas moved there?
A:
Answer: none