Detailed Instructions: 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.
Q: Question: How many years apart were Charles Gosse's father and brother? Passage:Charles Gosse was born in Hoddesdon, Hertfordshire, the youngest son of the surgeon William Gosse who, in the hopes of curing his bronchitis, brought his family to Australia in 1850, arriving in Adelaide on 31 December. Charles followed his brother William "Willie" in John L. Young's Adelaide Educational Institution, where he proved an apt pupil, being prominent at most prizegivings between 1857 and 1861. He was sent to England for further education; first at Clifton College in Bristol, then at Moorfields Hospital where he served as a Clinical Clerk and gained his M.R.C.S. in 1870. He studied medicine at Charing Cross Hospital, was admitted to the Royal College of Surgeons in 1870, and graduated with Bachelor of Medicine and Master of Surgery from the University of Aberdeen in 1872. He returned to Adelaide in 1873 and was promptly taken into partnership with his father. on North Terrace, and received his M.D. from Aberdeen in 1875. He was appointed to the Board of Management of the Adelaide Hospital in 1877. He was appointed ophthalmic surgeon to the Adelaide Hospital in 1881 and made the third member of its Medical Committee in 1883.

A:
a