tokens: ['This', 'field', 'is', 'the', 'serving', 'TWAG', 'IP', 'Address', 'for', 'the', 'Control', 'Plane', 'If', 'both', 'an', 'IPv', 'and', 'an', 'IPv', 'address', 'of', 'the', 'TWAG', 'is', 'available', 'the', 'TWAG', 'shall', 'include', 'the', 'IPv', 'address', 'in', 'the', 'CDR']