title: Sentence generation from Keywords.Each keyword have bag of related words
body: <p>I am working on Natural Language Generation project. Now I have bags of keywords and I am trying to generate sentence of pattern Subject+verb+object. Is there any tool or package or library to get sentences when i give bag of subject,bag of verb and bag of object?
  Example:
      subject=[teacher,student]
      verb=[teach]
      object=[book]
      answer: teacher teaching student from books.</p>