story: Nicole loved to write by an oil lamp at night. But it was messy to change the oil and the wick. When she had to do so, it was a challenge. She'd bring rags to protect the table. But when everything was ready, she could enjoy a nice light.
 selected sentence: When she had to do so, it was a challenge.
Nicole want(s) light >Motivates> Nicole changes the oil and wick of the lamp