input: 
  from typing import Tuple
  import pandas as pd
  
  def sql_to_pandas(sql_statement: str, conn) -> pd.DataFrame:
      """
      Convert a given SQL statement into a Python Pandas DataFrame.
      
      >>> sql_to_pandas("SELECT * FROM book;", conn)
         id title  author_id
      0   1   Book1         1
      1   2   Book2         2
      """
      return pd.read_sql_query(sql_statement, conn)
  
output:     return pd.read_sql_query(sql_statement, conn)