ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr:  [0/0] {1}                                   
 ¦   ¦--expr:  [0/1] {3}                               
 ¦   ¦   °--SYMBOL: b [0/0] {2}                        
 ¦   ¦--LEFT_ASSIGN: <- [0/1] {4}                      
 ¦   °--expr:  [1/0] {6}                               
 ¦       °--NUM_CONST: 3 [0/0] {5}                     
 ¦--expr:  [1/0] {8}                                   
 ¦   °--STR_CONST: "v x  [0/0] {7}                     
 ¦--expr:  [2/0] {10}                                  
 ¦   °--STR_CONST: "'tes [0/0] {9}                     
 ¦--expr:  [1/0] {11}                                  
 ¦   ¦--expr:  [0/1] {13}                              
 ¦   ¦   °--NUM_CONST: 99 [0/0] {12}                   
 ¦   ¦--'+': + [0/1] {14}                              
 ¦   °--expr:  [0/0] {16}                              
 ¦       °--NUM_CONST: 1 [0/0] {15}                    
 ¦--expr:  [1/0] {18}                                  
 ¦   °--STR_CONST: 'test [0/0] {17}                    
 ¦--expr:  [1/1] {20}                                  
 ¦   °--STR_CONST: 'test [0/0] {19}                    
 ¦--COMMENT: # com [0/0] {21}                          
 °--expr:  [1/0] {23}                                  
     °--NUM_CONST: 1 [0/0] {22}                        
