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
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Question:  ['Clouds rain over an area', 'People burn coal for heat or electricity', 'Pollution from the coal goes into the sky', 'Coal pollution enters clouds', 'People dig up coal from the ground', 'The polluted rain becomes acid rain.'] 

Answer:   No  


Question:  ['Blood enters the kidney', 'The blood travels into the neophrons', 'Waste is expelled via the neophrons', 'The waste goes to the bladder in the form of urine', 'The clean blood exits the kidneys.'] 

Answer:   Yes  


Question:  ['Iron is exposed to oxygen', 'Is exposed to air', 'A chemical reaction occurs', 'The iron starts to oxidize', 'The iron starts to rust.'] 

Answer:
  Yes