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 is the age difference between the friend of the de Tonei family and their foe? Passage:The manor is recorded in the Domesday Book where it is listed as Holehale, one of the lands of Robert de Stafford. "In Ferncombe Hundred in Holehale (Ullenhall) 1 hide. Land for 15 ploughs. 17 villagers and 11 smallholders with 6 ploughs. Woodland league long and 1 furlong wide. The value was and is 3 Waga held it." Waga, whose name is preserved in the nearby village of Wootton Wawen, was one of the witness's to Earl Leofric's, husband of Lady Godiva, foundation of the monastery at Coventry during the first year of the reign of Edward the Confessor (1042/3). His lands extended beyond those at Ullenhall, but, following the Conquest, Ullenhall was bestowed by the conqueror on Robert de Stafford, descended from the de Tonei family and who had fought stoutly with Duke William against King Harold. He made Stafford his principal seat, where he had a strong castle and assumed his surname from thence.

Output:
a