Complex sentence: CoBoost is a semi-supervised training algorithm proposed by Collins and Singer, where it had initial applications to Named Entity Classification using very weak learners Michael Collins and Yoram Singer, Unsupervised Models for Named Entity Classification.
Split into simpler sentences: CoBoost is a semi-supervised training algorithm proposed by Collins and Singer. The original application for the algorithm was the task of Named Entity Classification using very weak learners Michael Collins and Yoram Singer, Unsupervised Models for Named Entity Classification.