input: from typing import List, Tuple
  import sqlite3
  
  def fetch_horror_movies_from_db() -> List[Tuple]:
      """ Execute a SQL query to fetch all movies from the `Movies` table in `movies.db` 
      that belong to the 'horror' category. Return the results as a list of tuples.
      >>> fetch_horror_movies_from_db()
      [('The Shining', 'Horror', 1980), ('IT', 'Horror', 2017)]
      """
      conn = sqlite3.connect('movies.db')
      cursor = conn.cursor()
      cursor.execute("SELECT * FROM Movies WHERE category = 'horror'")
      result = cursor.fetchall()
      conn.close()
      return result
output:     conn = sqlite3.connect('movies.db')
      cursor = conn.cursor()
      cursor.execute("SELECT * FROM Movies WHERE category = 'horror'")
      result = cursor.fetchall()
      conn.close()
      return result