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

Example Input:  ['The carbon atoms rearrange to become a new substance.', 'Pressure builds over time', 'The remains liquefy', 'They are buried under layers of soil', 'Plants and animals long ago died'] 
Example Output:   No  

Example Input:  ['Animals and plants die in soft soil or mud', 'Sediment builds up over the remains', 'The remaining parts over the years are replaced with mineral', 'The remains decompose, leaving only trace amounts', 'A fossil is formed'] 
Example Output:   No  

Example Input:  ['One type of air pollution is the addition of carbon dioxide gas into the air', 'Some scientists believe that releasing too much carbon dioxide into the atmosphere is one of the causes of global warming', 'This upsets the balance of the carbon cycle', 'The ozone layer helps protect us from harmful rays from the sun', 'It is getting damaged from air pollution such as methane gas from livestock and CFCs from spray cans', 'Acid rain is created when gasses such as sulfur dioxide get high into the atmosphere', 'The wind can blow these gasses for miles and then they get washed out of the air when it rains', 'This rain is called acid rain and can damage forests and kill fish.'] 
Example Output:
  Yes