ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr: if(TR [0/0] {1}                              
 ¦   ¦--IF: if [0/0] {2}                               
 ¦   ¦--'(': ( [0/0] {3}                               
 ¦   ¦--expr: TRUE [0/0] {5}                           
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {4}                  
 ¦   ¦--')': ) [0/0] {6}                               
 ¦   ¦--expr: NULL [0/1] {8}                           
 ¦   ¦   °--NULL_CONST: NULL [0/0] {7}                 
 ¦   ¦--ELSE: else [0/1] {9}                           
 ¦   °--expr: NULL [0/0] {11}                          
 ¦       °--NULL_CONST: NULL [0/0] {10}                
 ¦--expr: if(TR [2/1] {12}                             
 ¦   ¦--IF: if [0/0] {13}                              
 ¦   ¦--'(': ( [0/0] {14}                              
 ¦   ¦--expr: TRUE [0/0] {16}                          
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {15}                 
 ¦   ¦--')': ) [0/0] {17}                              
 ¦   ¦--expr: NULL [0/1] {19}                          
 ¦   ¦   °--NULL_CONST: NULL [0/0] {18}                
 ¦   ¦--ELSE: else [0/1] {20}                          
 ¦   °--expr: NULL [0/0] {22}                          
 ¦       °--NULL_CONST: NULL [0/0] {21}                
 ¦--COMMENT: # com [0/0] {23}                          
 ¦--expr: if(TR [3/0] {24}                             
 ¦   ¦--IF: if [0/0] {25}                              
 ¦   ¦--'(': ( [0/0] {26}                              
 ¦   ¦--expr: TRUE [0/0] {28}                          
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {27}                 
 ¦   ¦--')': ) [0/0] {29}                              
 ¦   ¦--expr: NULL [0/1] {31}                          
 ¦   ¦   °--NULL_CONST: NULL [0/0] {30}                
 ¦   ¦--ELSE: else [0/1] {32}                          
 ¦   ¦--COMMENT: # com [0/1] {33}                      
 ¦   °--expr: NULL [1/0] {35}                          
 ¦       °--NULL_CONST: NULL [0/0] {34}                
 ¦--COMMENT: # if( [2/0] {36}                          
 ¦--COMMENT: #  el [1/0] {37}                          
 ¦--expr: if(TR [2/0] {38}                             
 ¦   ¦--IF: if [0/0] {39}                              
 ¦   ¦--'(': ( [0/0] {40}                              
 ¦   ¦--expr: TRUE [0/0] {42}                          
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {41}                 
 ¦   ¦--')': ) [0/1] {43}                              
 ¦   ¦--COMMENT: # com [0/0] {44}                      
 ¦   ¦--expr: NULL [1/1] {46}                          
 ¦   ¦   °--NULL_CONST: NULL [0/0] {45}                
 ¦   ¦--ELSE: else [0/1] {47}                          
 ¦   °--expr: NULL [0/0] {49}                          
 ¦       °--NULL_CONST: NULL [0/0] {48}                
 ¦--expr: if(TR [2/0] {50}                             
 ¦   ¦--IF: if [0/0] {51}                              
 ¦   ¦--'(': ( [0/0] {52}                              
 ¦   ¦--expr: TRUE [0/1] {54}                          
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {53}                 
 ¦   ¦--COMMENT: # com [0/0] {55}                      
 ¦   ¦--')': ) [1/0] {56}                              
 ¦   ¦--expr: NULL [0/1] {58}                          
 ¦   ¦   °--NULL_CONST: NULL [0/0] {57}                
 ¦   ¦--ELSE: else [0/1] {59}                          
 ¦   °--expr: NULL [0/0] {61}                          
 ¦       °--NULL_CONST: NULL [0/0] {60}                
 ¦--expr: if( # [2/0] {62}                             
 ¦   ¦--IF: if [0/0] {63}                              
 ¦   ¦--'(': ( [0/1] {64}                              
 ¦   ¦--COMMENT: # com [0/0] {65}                      
 ¦   ¦--expr: TRUE [1/0] {67}                          
 ¦   ¦   °--NUM_CONST: TRUE [0/0] {66}                 
 ¦   ¦--')': ) [0/0] {68}                              
 ¦   ¦--expr: NULL [0/1] {70}                          
 ¦   ¦   °--NULL_CONST: NULL [0/0] {69}                
 ¦   ¦--ELSE: else [0/1] {71}                          
 ¦   °--expr: NULL [0/0] {73}                          
 ¦       °--NULL_CONST: NULL [0/0] {72}                
 °--expr: if #  [2/0] {74}                             
     ¦--IF: if [0/1] {75}                              
     ¦--COMMENT: # com [0/0] {76}                      
     ¦--'(': ( [1/0] {77}                              
     ¦--expr: TRUE [0/0] {79}                          
     ¦   °--NUM_CONST: TRUE [0/0] {78}                 
     ¦--')': ) [0/0] {80}                              
     ¦--expr: NULL [0/1] {82}                          
     ¦   °--NULL_CONST: NULL [0/0] {81}                
     ¦--ELSE: else [0/1] {83}                          
     °--expr: NULL [0/0] {85}                          
         °--NULL_CONST: NULL [0/0] {84}                
