Given the task definition and input, reply with output. In this task, you're given a question, along with a context passage. The passage will not have a direct answer to the question, but can include some information and a clue for the answer. Assuming you can only obtain information about one entity in the passage, your job is to determine whether information from the passage can be used to answer the question. Indicate your choice as 'a' for Yes or 'b' for No.

Question: When did the fight in which the 4th Mechanized Corps participate in as part of Steppe Front begin? Passage:In December 1942 the Corps gained a Guards title and became the 3rd Guards Mechanised Corps. It fought at the Battle of Kursk as part of Steppe Front. In June 1944, for Operation Bagration, it was assigned to Chernyakhovsky's 3rd Belorussian Front as part of a Cavalry Mechanized Group which also included 3rd Cavalry Corps and was tasked to hit Bogushevsk in conjunction with 5th Army and 39th Army. Its units included 64th Guards Heavy Tank Regiment, which operated IS-2 heavy tanks while fighting as part of the 1st Baltic Front in the Siauliai ('Shaulay') area during July 1944. It was then moved to the Far East and took part in the invasion of Manchuria as part of the Transbaikal Front. The Corps, which gained the honorific Stalingrad-Krivorozhskaya, became 3rd Guards Mechanised Division in November 1945, and later 47th Guards Motor Rifle Division in 1957. It was finally disbanded on 27 November 1959 while serving with 5th Army in the Far East Military District at Dalnerechensk.
b