ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--expr: call( [0/0] {1}                              
 ¦   ¦--expr: call [0/0] {3}                           
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {2}       
 ¦   ¦--'(': ( [0/1] {4}                               
 ¦   ¦--COMMENT: # com [0/2] {5}                       
 ¦   ¦--expr: am [1/0] {7}                             
 ¦   ¦   °--SYMBOL: am [0/0] {6}                       
 ¦   °--')': ) [1/0] {8}                               
 ¦--expr: call( [2/0] {9}                              
 ¦   ¦--expr: call [0/0] {11}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {10}      
 ¦   ¦--'(': ( [0/2] {12}                              
 ¦   ¦--COMMENT: # com [1/2] {13}                      
 ¦   ¦--expr: am [1/0] {15}                            
 ¦   ¦   °--SYMBOL: am [0/0] {14}                      
 ¦   °--')': ) [1/0] {16}                              
 ¦--expr: call( [2/0] {17}                             
 ¦   ¦--expr: call [0/0] {19}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {18}      
 ¦   ¦--'(': ( [0/0] {20}                              
 ¦   ¦--expr: am [0/1] {22}                            
 ¦   ¦   °--SYMBOL: am [0/0] {21}                      
 ¦   ¦--COMMENT: # com [0/0] {23}                      
 ¦   °--')': ) [1/0] {24}                              
 ¦--expr: call( [2/0] {25}                             
 ¦   ¦--expr: call [0/0] {27}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {26}      
 ¦   ¦--'(': ( [0/0] {28}                              
 ¦   ¦--expr: am [0/0] {30}                            
 ¦   ¦   °--SYMBOL: am [0/0] {29}                      
 ¦   ¦--',': , [0/1] {31}                              
 ¦   ¦--COMMENT: # com [0/2] {32}                      
 ¦   ¦--expr: pm [1/0] {34}                            
 ¦   ¦   °--SYMBOL: pm [0/0] {33}                      
 ¦   °--')': ) [1/0] {35}                              
 ¦--expr: call( [3/0] {36}                             
 ¦   ¦--expr: call [0/0] {38}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {37}      
 ¦   ¦--'(': ( [0/0] {39}                              
 ¦   ¦--expr: b [0/0] {41}                             
 ¦   ¦   °--SYMBOL: b [0/0] {40}                       
 ¦   °--')': ) [1/0] {42}                              
 ¦--expr: call( [2/0] {43}                             
 ¦   ¦--expr: call [0/0] {45}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {44}      
 ¦   ¦--'(': ( [0/2] {46}                              
 ¦   ¦--expr: a [1/0] {48}                             
 ¦   ¦   °--SYMBOL: a [0/0] {47}                       
 ¦   °--')': ) [1/0] {49}                              
 ¦--expr: call( [2/0] {50}                             
 ¦   ¦--expr: call [0/0] {52}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {51}      
 ¦   ¦--'(': ( [0/2] {53}                              
 ¦   ¦--expr: a [1/1] {55}                             
 ¦   ¦   °--SYMBOL: a [0/0] {54}                       
 ¦   ¦--COMMENT: # b [0/0] {56}                        
 ¦   °--')': ) [1/0] {57}                              
 ¦--expr: call( [2/0] {58}                             
 ¦   ¦--expr: call [0/0] {60}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {59}      
 ¦   ¦--'(': ( [0/1] {61}                              
 ¦   ¦--COMMENT: # [0/0] {62}                          
 ¦   °--')': ) [1/0] {63}                              
 ¦--expr: call( [2/0] {64}                             
 ¦   ¦--expr: call [0/0] {66}                          
 ¦   ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {65}      
 ¦   ¦--'(': ( [0/0] {67}                              
 ¦   ¦--expr: a [0/1] {69}                             
 ¦   ¦   °--SYMBOL: a [0/0] {68}                       
 ¦   ¦--COMMENT: # b [0/0] {70}                        
 ¦   °--')': ) [1/0] {71}                              
 °--expr: call( [1/0] {72}                             
     ¦--expr: call [0/0] {74}                          
     ¦   °--SYMBOL_FUNCTION_CALL: call [0/0] {73}      
     ¦--'(': ( [0/0] {75}                              
     ¦--COMMENT: # b [0/2] {76}                        
     ¦--expr: a [1/0] {78}                             
     ¦   °--SYMBOL: a [0/0] {77}                       
     °--')': ) [0/0] {79}                              
