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: How old was Charles Anderson Dana when Edward Page Mitchell replaced him as The Sun's editor? Passage:Edward Page Mitchell (1852–1927) was an American editorial and short story writer for The Sun, a daily newspaper in New York City. He became that newspaper's editor in 1897, succeeding Charles Anderson Dana. Mitchell was recognized as a major figure in the early development of the science fiction genre. Mitchell wrote fiction about a man rendered invisible by scientific means ("The Crystal Man", published in 1881) before H.G. Wells's The Invisible Man, wrote about a time-travel machine ("The Clock that Went Backward") before Wells's The Time Machine, wrote about faster-than-light travel ("The Tachypomp"; now perhaps his best-known work) in 1874, a thinking computer and a cyborg in 1879 ("The Ablest Man in the World"), and also wrote the earliest known stories about matter transmission or teleportation ("The Man without a Body", 1877) and a superior mutant ("Old Squids and Little Speller"). "Exchanging Their Souls" (1877) is one of the earliest fictional accounts of mind transfer. Mitchell retired in 1926, a year before dying of a cerebral hemorrhage.


b