Words are not Equal: Graded Weighting Model for Building Composite Document Vectors Pranjal Singh author Amitabha Mukerjee author 2015-12 text Proceedings of the 12th International Conference on Natural Language Processing Dipti Misra Sharma editor Rajeev Sangal editor Elizabeth Sherly editor NLP Association of India Trivandrum, India conference publication singh-mukerjee-2015-words https://aclanthology.org/W15-5903/ 2015-12 11 19