Go to hairdresser has a precondition of take shower. Hike has a precondition of go shop. Take midterm has a precondition of attend class. Attend class has a precondition of go to school. Take shower has a precondition of use water. Hike does not have a precondition of use water. Take midterm does not have a precondition of be born. Proofread has a precondition of go shop. Go to school has a precondition of take shower. Take midterm does not have a precondition of get out your notebook. Get job has a precondition of go to school. Have bath has a precondition of use water. Attend class does not have a precondition of get out your notebook.
Take shower has a precondition of use water.