1. Entry
     Text Observation (2.16.840.1.113883.10.20.6.2.12)
    1. Entry
       SOP Instance Observation (2.16.840.1.113883.10.20.6.2.8)
      1. Entry
         Purpose of Reference Observation (2.16.840.1.113883.10.20.6.2.9)
      2. Entry
         Referenced Frames Observation (2.16.840.1.113883.10.20.6.2.10)
        1. Entry
           Boundary Observation (2.16.840.1.113883.10.20.6.2.11)
    2. Entry
       Quantity Measurement Observation (2.16.840.1.113883.10.20.6.2.14)
      1. Entry
         SOP Instance Observation (2.16.840.1.113883.10.20.6.2.8)
        1. Entry
           Purpose of Reference Observation (2.16.840.1.113883.10.20.6.2.9)
        2. Entry
           Referenced Frames Observation (2.16.840.1.113883.10.20.6.2.10)
          1. Entry
             Boundary Observation (2.16.840.1.113883.10.20.6.2.11)