story: Alice had very long hair. One day, she decided to get it cut. She was nervous because she'd never had short hair before. The whole time she was in the barber's chair, she was nervous. However, when she saw her new short hair, she loved it!
 selected sentence: She was nervous because she'd never had short hair before.
She was nervous because she'd never had short hair before >Causes/Enables> She was nervous the whole time she was in the barber's chair