ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr:  [0/2] {1}                                   
 ¦   ¦--expr:  [0/1] {3}                               
 ¦   ¦   °--SYMBOL: a [0/0] {2}                        
 ¦   ¦--OR2: || [0/0] {4}                              
 ¦   °--expr:  [1/0] {6}                               
 ¦       °--SYMBOL: b [0/0] {5}                        
 ¦--expr:  [2/0] {7}                                   
 ¦   ¦--expr:  [0/1] {9}                               
 ¦   ¦   °--SYMBOL: a [0/0] {8}                        
 ¦   ¦--GT: > [0/0] {10}                               
 ¦   °--expr:  [1/0] {12}                              
 ¦       °--NUM_CONST: 4 [0/0] {11}                    
 ¦--expr:  [2/0] {13}                                  
 ¦   ¦--expr:  [0/0] {15}                              
 ¦   ¦   °--SYMBOL: a [0/0] {14}                       
 ¦   ¦--AND: & [0/0] {16}                              
 ¦   °--expr:  [1/0] {18}                              
 ¦       °--NUM_CONST: 3 [0/0] {17}                    
 ¦--expr:  [2/0] {19}                                  
 ¦   ¦--expr:  [0/1] {21}                              
 ¦   ¦   °--SYMBOL: b [0/0] {20}                       
 ¦   ¦--SPECIAL-IN: %in% [0/1] {22}                    
 ¦   °--expr:  [1/0] {24}                              
 ¦       °--SYMBOL: c [0/0] {23}                       
 ¦--expr:  [2/0] {25}                                  
 ¦   ¦--expr:  [0/0] {27}                              
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: data_ [0/0] {26}     
 ¦   ¦--'(': ( [0/0] {28}                              
 ¦   ¦--SYMBOL_SUB: a [1/5] {29}                       
 ¦   ¦--EQ_SUB: = [0/6] {30}                           
 ¦   ¦--expr:  [1/1] {31}                              
 ¦   ¦   ¦--expr:  [0/0] {33}                          
 ¦   ¦   ¦   °--SYMBOL_FUNCTION_CALL: list [0/0] {32}  
 ¦   ¦   ¦--'(': ( [0/0] {34}                          
 ¦   ¦   °--')': ) [0/0] {35}                          
 ¦   °--')': ) [1/0] {36}                              
 °--expr:  [1/0] {36.9}                                
     ¦--expr:  [0/1] {38}                              
     ¦   °--SYMBOL: b [0/0] {37}                       
     ¦--EQ_ASSIGN: = [0/0] {39}                        
     °--expr:  [1/0] {41}                              
         °--NUM_CONST: 3 [0/0] {40}                    
