Detailed Instructions: Use a disfluent question or a proper question and find the answer to the question based on the given context or return None if an answer can't be found. A disfluent question is a question that has some interruptions in it while framing. A proper question is the correct form of the question without any disfluency.
Problem:proper question: What runs from the balancer in the statocyst to the comb rows? 
 disfluent question: How are sorry What runs from the balancer in the statocyst to the comb rows? 
 context: There are eight rows of combs that run from near the mouth to the opposite end, and are spaced evenly round the body. The combs beat in a metachronal rhythm rather like that of a Mexican wave. From each balancer in the statocyst a ciliary groove runs out under the dome and then splits to connect with two adjacent comb rows, and in some species runs all the way along the comb rows. This forms a mechanical system for transmitting the beat rhythm from the combs to the balancers, via water disturbances created by the cilia.
Solution:
a ciliary groove