Detailed Instructions: 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'.
Problem:Passage: Baron Lyell, of Kinnordy in the County of Forfar, was a title in the Peerage of the United Kingdom. It was created in 1914 for the Scottish Liberal politician Sir Leonard Lyell, 1st Baronet. He had already been created a baronet, of Kinnordy in the County of Forfar, in 1894. As his son Charles, a Liberal Member of Parliament, died on 18 October 1918 of pneumonia while serving as Assistant Military Attache to the USA, he was succeeded by his grandson, the second Baron. He was posthumously awarded the Victoria Cross for his actions in North Africa during the Second World War. He was succeeded in the titles by his son, the third Baron, in 1943. He was one of the ninety-two elected hereditary peers that remain in the House of Lords after the passing of the House of Lords Act 1999, and sat on the Conservative benches. The titles became extinct on his death in 2017.
Link Information: He was appointed as the Parliamentary Private Secretary to H. H. Asquith, the Prime Minister, in February 1911, and stood down from the seat in May 1917. Question: What years did Baron Lyell's son serve as a member of parliament?
Solution:
Answer: 12