ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--COMMENT: #' Th [0/0] {1}                           
 ¦--COMMENT: #' [1/0] {2}                              
 ¦--COMMENT: #' St [1/0] {3}                           
 ¦--COMMENT: #' @f [1/0] {4}                           
 ¦--COMMENT: #' @e [1/0] {5}                           
 ¦--COMMENT: #' st [1/0] {6}                           
 ¦--COMMENT: #' st [1/0] {7}                           
 ¦--COMMENT: #' st [1/0] {8}                           
 ¦--COMMENT: #' st [1/0] {9}                           
 ¦--COMMENT: #' @i [1/0] {10}                          
 ¦--COMMENT: #' @e [1/0] {11}                          
 °--expr:  [1/0] {12}                                  
     ¦--expr:  [0/0] {14}                              
     ¦   °--SYMBOL: a [0/0] {13}                       
     ¦--LEFT_ASSIGN: <- [0/0] {15}                     
     °--expr:  [0/0] {17}                              
         °--SYMBOL: call [0/0] {16}                    
