A Hybrid Approach to Single and Multiple PP Attachment Using WordNet Akshar Bharathi author U Rohini author P Vishnu author S M Bendre author Rajeev Sangal author 2005 text Second International Joint Conference on Natural Language Processing: Full Papers conference publication bharathi-etal-2005-hybrid 10.1007/11562214_19 https://aclanthology.org/I05-1019/ 2005