(script
  (expression_statement
    (selection_expression
      (variable)
      (variable)))
  (expression_statement
    (selection_expression
      (qualified_identifier
        (identifier))
      (variable)))
  (expression_statement
    (selection_expression
      (qualified_identifier
        (identifier))
      (qualified_identifier
        (identifier))))
  (expression_statement
    (selection_expression
      (subscript_expression
        (selection_expression
          (qualified_identifier
            (identifier)
            (identifier))
          (variable))
        (integer))
      (qualified_identifier
        (identifier))))
  (expression_statement
    (subscript_expression
      (selection_expression
        (subscript_expression
          (variable)
          (integer))
        (variable))
      (integer)))
  (expression_statement
    (subscript_expression
      (selection_expression
        (subscript_expression
          (variable)
          (integer))
        (qualified_identifier
          (identifier)))
      (integer))))