ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr:  [0/0] {1}                                   
 ¦   ¦--expr:  [0/1] {6}                               
 ¦   ¦   °--NUM_CONST: 1 [0/0] {5}                     
 ¦   ¦--'+': + [0/7] {7}                               
 ¦   ¦--expr:  [1/1] {9}                               
 ¦   ¦   °--NUM_CONST: 2 [0/0] {8}                     
 ¦   ¦--'+': + [0/0] {10}                              
 ¦   ¦--expr:  [1/1] {12}                              
 ¦   ¦   °--NUM_CONST: 3 [0/0] {11}                    
 ¦   ¦--'+': + [0/7] {13}                              
 ¦   ¦--expr:  [1/1] {15}                              
 ¦   ¦   °--NUM_CONST: 4 [0/0] {14}                    
 ¦   ¦--'-': - [0/2] {16}                              
 ¦   °--expr:  [1/0] {18}                              
 ¦       °--NUM_CONST: 5 [0/0] {17}                    
 °--expr:  [2/0] {19}                                  
     ¦--expr:  [0/1] {21}                              
     ¦   °--NUM_CONST: 1 [0/0] {20}                    
     ¦--'+': + [0/1] {22}                              
     °--expr:  [0/0] {24}                              
         °--NUM_CONST: 1 [0/0] {23}                    
