ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr: 1 +
  [0/0] {1}                             
 ¦   ¦--expr: 1 [0/1] {4}                              
 ¦   ¦   °--NUM_CONST: 1 [0/0] {3}                     
 ¦   ¦--'+': + [0/5] {5}                               
 ¦   ¦--expr: 2     [1/1] {6}                          
 ¦   ¦   ¦--expr: 2 [0/4] {9}                          
 ¦   ¦   ¦   °--NUM_CONST: 2 [0/0] {8}                 
 ¦   ¦   ¦--'/': / [0/2] {10}                          
 ¦   ¦   ¦--expr: 8 [1/0] {12}                         
 ¦   ¦   ¦   °--NUM_CONST: 8 [0/0] {11}                
 ¦   ¦   ¦--'/': / [0/5] {13}                          
 ¦   ¦   °--expr: 5 [1/0] {15}                         
 ¦   ¦       °--NUM_CONST: 5 [0/0] {14}                
 ¦   ¦--'+': + [0/0] {16}                              
 ¦   °--expr: 13 [1/0] {18}                            
 ¦       °--NUM_CONST: 13 [0/0] {17}                   
 ¦--expr: 1 +
  [3/0] {19}                            
 ¦   ¦--expr: 1 [0/1] {22}                             
 ¦   ¦   °--NUM_CONST: 1 [0/0] {21}                    
 ¦   ¦--'+': + [0/2] {23}                              
 ¦   ¦--expr: + 1 [1/1] {24}                           
 ¦   ¦   ¦--'+': + [0/1] {25}                          
 ¦   ¦   °--expr: 1 [0/0] {27}                         
 ¦   ¦       °--NUM_CONST: 1 [0/0] {26}                
 ¦   ¦--'-': - [0/0] {28}                              
 ¦   °--expr: -1 /
 [1/0] {29}                        
 ¦       ¦--expr: -1 [0/1] {31}                        
 ¦       ¦   ¦--'-': - [0/0] {32}                      
 ¦       ¦   °--expr: 1 [0/0] {34}                     
 ¦       ¦       °--NUM_CONST: 1 [0/0] {33}            
 ¦       ¦--'/': / [0/2] {35}                          
 ¦       ¦--expr: 27 [1/2] {37}                        
 ¦       ¦   °--NUM_CONST: 27 [0/0] {36}               
 ¦       ¦--'/': / [0/2] {38}                          
 ¦       °--expr: - 3 [1/0] {39}                       
 ¦           ¦--'-': - [0/1] {40}                      
 ¦           °--expr: 3 [0/0] {42}                     
 ¦               °--NUM_CONST: 3 [0/0] {41}            
 °--expr: 1 /
  [2/0] {43}                            
     ¦--expr: 1 [0/1] {46}                             
     ¦   °--NUM_CONST: 1 [0/0] {45}                    
     ¦--'/': / [0/2] {47}                              
     ¦--expr: 2 [1/1] {49}                             
     ¦   °--NUM_CONST: 2 [0/0] {48}                    
     ¦--'+': + [0/2] {50}                              
     °--expr: 33 *
 [1/0] {51}                        
         ¦--expr: 33 [0/1] {53}                        
         ¦   °--NUM_CONST: 33 [0/0] {52}               
         ¦--'*': * [0/2] {54}                          
         °--expr: 2 [1/0] {56}                         
             °--NUM_CONST: 2 [0/0] {55}                
