input: Please answer the following: What is the missing first step of the following process:  -  Above the oven is a tank of water that is sealed - The tank of water begins to boil above the oven - A the water boils steam is created - The steam is denser than air so it needs a place to go - The steam is forced out of the tank and into a piston - The piston moves up - The valve of the piston closes - The valve on the next piston opens - The steam fills the next piston, driving it up, and the other one down -
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output: A fuel is heated in an oven

Please answer this: What is the missing first step of the following process:  -  Oxygen moves from the lungs into the bloodstream - Air is pushed through the vocal chords - A person talks - Other air is pushed out of the lungs into the environment.
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Answer: Air is pulled into the lungs

Problem: What is the missing first step of the following process:  -  Air goes through all the little branches in your lungs to fill up the air sacs, or alveoli - Oxygen goes through the walls of the alveoli and into the capillaries - The oxygen goes into the bloodstream - Oxygen is left and carbon dioxide is picked up - You breathe it out through your lungs -

A: You breathe in

Problem: Given the question: What is the missing first step of the following process:  -  They are buried under layers of soil - Pressure builds over time - The remains liquefy - The carbon atoms rearrange to become a new substance.
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The answer is:
Plants and animals long ago died

input question: What is the missing first step of the following process:  -  The owl flys out into the night - The owl looks down at the ground - The owls keen eyesight allows him to see in the dark - The owls sensitive hearing allows him to locate hidden prey - The owl swoops down - The owl catches a mouse in his talons.???
output answer: An owl leaves his nest

input question: What is the missing first step of the following process:  -  The sediment rolls down hill towards a river - The heavy items sink to the bottom - The lighter items float on the top and in convection cycles - As the river flows the sediment is moved - The sediment gets dumped through tributaries into lakes and the ocean - The sediment keeps moving around the world in convection currents.???
output answer:
Sediment becomes loose from the rest of the soil