input: Please answer the following: What is the missing first step of the following process: - The lungs have a series of smaller and finer tubes and sacs - Air reaches the smallest and finest air sacs called alveoli - Oxygen travels from the alveoli into the blood - Oxygen-rich blood is carried to the heart - Oxygen-rich blood is pumped throughout the body by the heart - Cells take in the oxygen rich blood and release carbon dioxide rich blood - The carbon dioxide rich blood travels to the lungs - Carbon dioxide travels through the throat and is exhaled.
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output: Air enters the nose or mouth and travels through the windpipe into the lungs

Please answer this: What is the missing first step of the following process: - The water freezes into ice - The cracks expand - Over time the rocks split - The rocks are now in smaller pieces.
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Answer: Water gets into cracks in rocks

Problem: What is the missing first step of the following process: - Liver also cleans blood that has just been enriched with vitamins and minerals during digestion - Liver processes the good stuff into forms that the rest of the body can use - Waste or stuff your body doesn't need can be carried by bile back into the intestine or into the kidneys - The liver also produces a digestive juice called bile that helps the body absorb fat into the bloodstream - The liver also stores extra carbohydrates as glycogen for the body to use as fuel when needed.

A: The liver removes toxins from the blood

Problem: Given the question: What is the missing first step of the following process: - May come from different sources - The gases remain trapped in the atmosphere - Through the suns light the gases hold in heat and energy - Trap them in our atmosphere - The earth may become warmer this way.
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The answer is:
Several types of gases form in the atmosphere

input question: What is the missing first step of the following process: - Water is poured into the well of the machine - A filter is placed in the basket - Ground coffee is measured into the filter - Turning on the machine starts the water heating - The hot water rises up - The water drops into the ground coffee - The hot water passes through the grounds - The coffee drips into the pot from the basket.???
output answer: The coffee pot is filled with water

input question: What is the missing first step of the following process: - The fire surrounds the vicinity - The animals are trapped - Those that survive have their habitat destroyed - The survivors must find a new habitat - Conflict with other animals occur.???
output answer:
A forest fire starts