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.
Input: Question: Who was the leader of Somalia's National Security Agency? Passage:Mohammed and a Kenyan extremist, thought to be Musa Hussein (a.k.a. Musa Sambayo), were driving in a car carrying $40,000 in United States dollars, as well as medicine, telephones, laptops and a South African passport in the Afgooye corridor, northwest of Mogadishu on 7 June 2011. Musa Hussein was known to Mohammed as Abdullahi Dere and is believed to have been involved in funding operations for al-Shabaab. At around 11:15p.m., the car was stopped at a security checkpoint managed by the Somalian military (SNA) in the Sarkuusta area, in southwest Mogadishu. Captain Hassan Mohamed Abukar ordered the driver to switch on the light inside the car. The driver followed the order but switched the light on and off too quickly for the soldiers to identify the people in the car, then one of the occupants opened fire. An order was given to open fire on the car. Two occupants in the car were killed and buried in Mogadishu within 24 hours. A third occupant escaped. Somalia's National Security Agency suspected one of the dead to be Fazul after examination of the belongings; DNA tests subsequently confirmed his identity. Documents found on his body indicated he was planning a number of attacks in Britain, one of which targeted the notable Eton College.

Output:
a