1. trip
   1. korea
   2. china
2. marriage
   1. korean
   2. taiwanese
   3. chinese
   4. american
   5. japanese
3. management
   1. hotel
   2. restaurant
   3. resort
   4. wedding
4. university
   1. CSN
      1. class
         1. IS
            1. excel
            2. powerpoint
            3. ward
         2. misic
            1. piano
            2. dram
            3. guitar
         3. english
         4. math
         5. hotel management
      2. exam
         1. english
         2. math
   2. Cornell
   3. New York University
   4. UCLA
5. house moving
   1. africa
   2. japan
      1. kobe
      2. kyoto
      3. akashi
      4. tokyo
   3. korea
      1. soul
   4. america
      1. nevada
      2. calfornia
6. work
   1. hotel
      1. bar
      2. house keeper
      3. manager
      4. waiter
   2. consultant