Given the task definition and input, reply with output. 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.

Question: How many years after Nathaniel Treat's descendant passed away did Nathaniel marry Mary Parker? Passage:Treat was born in Frankfort, Maine on December 29, 1798. He was a descendant of Robert Treat. In 1823, Treat married Mary P. Parker. They had ten children, including Joseph B. Treat, who became a member of the Wisconsin State Senate and chairman of the Republican State Central Committee. Treat built sawmills, served as a bank president, and became involved in the lumber industry. His former home in Orono, Maine, now known as the Nathaniel Treat House, is listed on the National Register of Historic Places. In 1870, Treat moved to Monroe, Wisconsin, where he died on February 4, 1894. His grandson, Charles Treat, became a major general in the United States Army. Treat and his family were Universalists.
b