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:  ['Allow the water vapor to cool', 'Collect the water vapor', 'Boil salt water', 'The water vapor will turn into liquid water', 'The water will turn into water vapor', 'The salt will be separated from the water.'] 
Example Output:   No  

Example Input:  ['Pollution enters natural water sources such as rivers and lakes', 'The pollution negatively affects the water quality', 'The pollution negatively affects the health of plants and animals', 'The plants and animals have shorter, less healthy lives', 'The plants and animals do not reproduce very well', 'The number of plants and animals decreases over time', 'The quality of water gets worse and worse as there are no plants or animals to clean it', 'Eventually there is nothing living in the water and it is unusable'] 
Example Output:   Yes  

Example Input:  ['The thermostat senses that the temperature has dropped', 'A signal is sent to the heating system', 'Heating oil travels from the tank to the burner', 'The oil becomes a fine mist mixed with air', 'The oil/air combination is injected into the burner', 'The burner is ignited in the combustion chamber', 'The furnace heats the air', 'The blower sends the heated air through the ducts', 'The heated air comes out the vents and into the room.'] 
Example Output:
  Yes