ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--COMMENT: #' Pr [0/0] {1}                           
 ¦--COMMENT: #' [1/0] {2}                              
 ¦--COMMENT: #' Pe [1/0] {3}                           
 ¦--COMMENT: #' Ca [1/0] {4}                           
 ¦--COMMENT: #' @e [1/0] {5}                           
 ¦--COMMENT: #' ti [1/0] {6}                           
 ¦--COMMENT: #' @n [1/0] {7}                           
 ¦--expr: a <-  [1/0] {8}                              
 ¦   ¦--expr: a [0/1] {10}                             
 ¦   ¦   °--SYMBOL: a [0/0] {9}                        
 ¦   ¦--LEFT_ASSIGN: <- [0/1] {11}                     
 ¦   °--expr: 2 [0/0] {13}                             
 ¦       °--NUM_CONST: 2 [0/0] {12}                    
 ¦--COMMENT: #' Th [2/0] {14}                          
 ¦--COMMENT: #' [1/0] {15}                             
 ¦--COMMENT: #' St [1/0] {16}                          
 ¦--COMMENT: #' @f [1/0] {17}                          
 ¦--COMMENT: #' @e [1/0] {18}                          
 ¦--COMMENT: #' st [1/0] {19}                          
 ¦--COMMENT: #' st [1/0] {20}                          
 ¦--COMMENT: #' st [1/0] {21}                          
 ¦--COMMENT: #' c( [1/0] {22}                          
 ¦--COMMENT: #' st [1/0] {23}                          
 ¦--COMMENT: #' @i [1/0] {24}                          
 ¦--COMMENT: #' @e [1/0] {25}                          
 ¦--expr: a     [1/0] {26}                             
 ¦   ¦--expr: a [0/5] {28}                             
 ¦   ¦   °--SYMBOL: a [0/0] {27}                       
 ¦   ¦--LEFT_ASSIGN: <- [0/1] {29}                     
 ¦   °--expr: call [0/0] {31}                          
 ¦       °--SYMBOL: call [0/0] {30}                    
 °--';': ; [0/0] {32}                                  
