sentence1: collobert and weston and collobert et al employed a deep learning framework for multi-task learning including part-of-speech tagging , chunking , namedentity recognition , language modelling and semantic role-labeling .
sentence2: collobert et al propose a multi-task learning framework with dnn for various nlp tasks , including part-of-speech tagging , chunking , named entity recognition , and semantic role labelling .