input question: What is the missing first step of the following process: - The female lays eggs - The eggs are incubated by the parents, by sitting on them, for weeks - The bird hatches from an egg - The parents feed them as the continue to grow - Develop flight feathers - The parents teach them to fly - After learning to fly they leave the nest to live on their own - The next year they breed beginning the cycle again -???
output answer: A male and female bird mate

What is the missing first step of the following process: - The rain seeps into the wood surface - It permeates the wood - When rain evaporates it leaves the wood - It takes the finish of the wood with it - The wood begins to lose it's luster - It begins to look bad - It has pieces of paint missing from the rain - It gets worse when it rains - It eventually will have no paint left.
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Answer: Rain falls on wood

Q: What is the missing first step of the following process: - The egg hatches into a baby bird - Baby bird eats - Grows into an adult bird - The bird finds a mate - The pair build a nest - The birds lay eggs.
A: A bird lays an egg

Question: What is the missing first step of the following process: - Through warming or other methods a chunk is taken off the glacier - The chunk drifts into the sea - And it settles where it can remain in its state - It is considered an iceberg.
Answer: You start with a glacier

[Q]: 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.
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[A]: The coffee pot is filled with water

Problem: Given the question: What is the missing first step of the following process: - People burn coal for heat or electricity - Pollution from the coal goes into the sky - Coal pollution enters clouds - Clouds rain over an area - The polluted rain becomes acid rain.
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The answer is:
People dig up coal from the ground