Alok Singh author Loitongbam Sanayai Meetei author Salam Michael Singh author Thoudam Doren Singh author Sivaji Bandyopadhyay author 2021-12 text Sivaji Bandyopadhyay editor Sobha Lalitha Devi editor Pushpak Bhattacharyya editor NLP Association of India (NLPAI) National Institute of Technology Silchar, Silchar, India conference publication singh-etal-2021-efficient https://aclanthology.org/2021.icon-main.29/ 2021-12 240 250