ROOT (token: short_text [lag_newlines/spaces] {pos_id})      
 °--expr: mtcar [0/0] {1}                                    
     ¦--expr: mtcar [0/1] {4}                                
     ¦   °--SYMBOL: mtcar [0/0] {3}                          
     ¦--SPECIAL-PIPE: %>% [0/2] {5}                          
     ¦--expr: group [1/1] {6}                                
     ¦   ¦--expr: group [0/0] {8}                            
     ¦   ¦   °--SYMBOL_FUNCTION_CALL: group [0/0] {7}        
     ¦   ¦--'(': ( [0/0] {9}                                 
     ¦   ¦--expr: am [0/0] {11}                              
     ¦   ¦   °--SYMBOL: am [0/0] {10}                        
     ¦   °--')': ) [0/0] {12}                                
     ¦--SPECIAL-PIPE: %>% [0/2] {13}                         
     °--expr: summa [1/0] {14}                               
         ¦--expr: summa [0/0] {16}                           
         ¦   °--SYMBOL_FUNCTION_CALL: summa [0/0] {15}       
         ¦--'(': ( [0/4] {17}                                
         ¦--expr: !!mea [1/0] {18}                           
         ¦   ¦--expr: !!mea [0/0] {19}                       
         ¦   ¦   ¦--'!': ! [0/0] {20}                        
         ¦   ¦   °--expr: !mean [0/0] {21}                   
         ¦   ¦       ¦--'!': ! [0/0] {22}                    
         ¦   ¦       °--expr: mean_ [0/0] {24}               
         ¦   ¦           °--SYMBOL: mean_ [0/0] {23}         
         ¦   ¦--LEFT_ASSIGN: := [0/0] {25}                   
         ¦   °--expr: mean( [0/0] {26}                       
         ¦       ¦--expr: mean [0/0] {28}                    
         ¦       ¦   °--SYMBOL_FUNCTION_CALL: mean [0/0] {27}
         ¦       ¦--'(': ( [0/0] {29}                        
         ¦       ¦--expr: cyl [0/0] {31}                     
         ¦       ¦   °--SYMBOL: cyl [0/0] {30}               
         ¦       °--')': ) [0/0] {32}                        
         ¦--',': , [0/4] {33}                                
         ¦--expr: !!cou [1/2] {34}                           
         ¦   ¦--expr: !!cou [0/4] {35}                       
         ¦   ¦   ¦--'!': ! [0/0] {36}                        
         ¦   ¦   °--expr: !coun [0/0] {37}                   
         ¦   ¦       ¦--'!': ! [0/0] {38}                    
         ¦   ¦       °--expr: count [0/0] {40}               
         ¦   ¦           °--SYMBOL: count [0/0] {39}         
         ¦   ¦--LEFT_ASSIGN: := [0/0] {41}                   
         ¦   °--expr: n() [0/0] {42}                         
         ¦       ¦--expr: n [0/0] {44}                       
         ¦       ¦   °--SYMBOL_FUNCTION_CALL: n [0/0] {43}   
         ¦       ¦--'(': ( [0/0] {45}                        
         ¦       °--')': ) [0/0] {46}                        
         °--')': ) [1/0] {47}                                
