input: 
  from typing import List
  
  
  def extract_number_starts_with(phone_numbers: List[str], prefix: str) -> List[str]:
      """Given a list of phone numbers, extract only the ones that start with a specified
      prefix.
      >>> extract_number_starts_with(['0834567', '0945678', '07123456', '08901234', '07890123'], '08')
      ['0834567', '08901234']
      """
      return [number for number in phone_numbers if number.startswith(prefix)]
  
output:     return [number for number in phone_numbers if number.startswith(prefix)]