Travel
作者:Sean Gravley

1. Business
1.1. Conference
1.2. Celebration
2. $ Cost $
2.1. Paid for
2.2. Very expensive
3. Duration
3.1. Days
3.2. Weeks
3.3. Months
4. Where to
4.1. Out of the country
4.2. Staying in the country
5. Vacation
5.1. Reason
5.1.1. Visiting family
5.1.2. Sight-seeing
5.1.3. Relaxation
5.1.4. Thrill