In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
Q: Context: The Los Angeles County Metropolitan Transportation Authority (LA Metro) operates the Blue Line, a light rail service Link Information: The Metro A Line (formerly the Blue Line) is a 22.0 mi light rail line running north-south between Los Angeles and Long Beach, California, Answer: 22.0 mi l
A:
What is the total length of the light rail service operated by the Los Angeles County Metropolitan Transportation Authority?