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: How long is the river whose floodplain is near the Story Mound? Passage:The Story Mound is a Native American mound in the southwestern part of the U.S. state of Ohio. Located in the Sayler Park neighborhood of the city of Cincinnati, the mound lies along Gracely Drive. No archaeological excavation has ever been conducted at the mound, and it has remained otherwise undisturbed as well; consequently, the mound remains in pristine condition. Despite the lack of evidence from excavations, the mound has been determined to be a work of the Adena culture, due in part to artifacts such as bones that have been found in the land immediately surrounding the mound. These findings, together with the mound's location near the floodplain of the Ohio River, have been understood as evidence of a larger group of Adena sites in the vicinity of the Story Mound. Such a complex, if it exists, would have great value as an archaeological site; therefore, the Story Mound was listed on the National Register of Historic Places in 1975.


b