Given the task definition and input, reply with output. In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: Which of the following is the most efficient way to transport large amounts of coal from a mine in Kentucky to a power plant in Arizona? Answer: by train

By train of the following is the most efficient way to transport large amounts of coal from a mine in kentucky to a power plant in arizona.