You will be given a definition of a task first, then some input of the task.
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: How many people reside in the city where US 311 begins at the US 52/NC 8 interchange? Passage:US311 begins at the US52/NC8 interchange in Winston-Salem, NC. It follows N Martin Luther King Jr Dr for a short time before continuing northeast along a two-lane road. It travels northeast and intersects NC 66 at the edge of Walkertown, then turns to follow Harley Drive and turns again to follow Main Street through town. Leaving Walkertown, the road takes the local name of Walnut Cove Road. At the southern edge of the town of Walnut Cove NC 65 joins for a short concurrency. At the northern boundary of Walnut Cove, NC 89 has its terminus at US 311, and the highway turns northeast. North Carolina Highway 772 terminates at US 311 near Pine Hall and entering the town of Madison, US 311 takes a westerly route. West of Madison, it joins with Future Interstate 73/US220 briefly to Mayodan, then leaving the freeway, it joins with NC 135 towards Eden. Three other NC routes join with 311 in Eden in short succession: NC 770, NC 87 and NC 14, then the 4 joined routes cross the Dan River along Van Buren Street in Eden. US 311 leaves Van Buren Street on a grade-separated interchange onto Meadow Road near the Eden Mall, heading northeast into a rural area before crossing into Virginia.

Output:
b