Random Indexing Re-Hashed Erik Velldal author 2011-05 text Proceedings of the 18th Nordic Conference of Computational Linguistics (NODALIDA 2011) Bolette Sandford Pedersen editor Gunta Nešpore editor Inguna Skadiņa editor Northern European Association for Language Technology (NEALT) Riga, Latvia conference publication velldal-2011-random https://aclanthology.org/W11-4631/ 2011-05 224 229