text: from sqlalchemy import Column, Integer, String, Boolean
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import relationship, sessionmaker
  from sqlalchemy import create_engine
  
  Base = declarative_base()
  
  class Knowledge(Base):
  	# Create a table with 4 columns
  	# The first column will be the primary key
  	# The second column should be a string representing
  	# the name of the Wiki article that you're referencing
  	# The third column will be a string representing the 
  	# topic of the article. The last column will be
  	# an integer, representing your rating of the article.
  	__tablename__ = 'students'
  	ID = Column(Integer, primary_key=True)
  	article_name = Column(String)
  	topic = Column(String)
  	rating = Column(Integer)
  
  	def __repr__(self):
  		return ("article_name: {}\n"
  				"topic of article: {}\n"
  				"rating of article: {}\n"
  	 			"ID: {}").format(
  					self.article_name,
  					self.topic,
  					self.rating,
  					self.ID)
  
  