Instructions: You need to answer the question 'Are the given steps in order?', given a set of steps describing a process. Your answer must be either Yes or No. If the answer is No, that means the steps are out of order and do not make sense in the order they are in. If the answer is Yes, that means the steps are in order and make sense in the order that they are in. A set of steps are not in order if the steps reference information that is introduced in a later step
Input:  ['Some of the rock in the ground is made of limestone', 'Over long periods of time rain can hit the limestone', 'And cause a acidic reaction', 'The limestone will slowly disintegrate', 'A large gap with be where the limestone was', 'Result in the cave.'] 
Output:
  Yes  