Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: What years did Baron Lyell's son serve as a member of parliament? 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 Attaché 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.


b