Given an input stream, the objective of this task is to classify whether words in the stream are grammatically correct or not. The input to this task is a stream of words, possibly from captions generated by a speech-to-text engine, and the output is a classification of each word from the labels (reason) = [NO_DIFF (correct), CASE_DIFF (case error), PUNCUATION_DIFF (punctuation error), CASE_AND_PUNCUATION_DIFF (both case and punctuation error), STEM_BASED_DIFF (stem word error), DIGIT_DIFF (digit error), INTRAWORD_PUNC_DIFF (intra-word punctuation error), and UNKNOWN_TYPE_DIFF (an error that does not corrrespond to the previous categories)].

["we're", 'in', 'the', 'Prado', 'in', 'Madrid', 'and', "we're", 'looking', 'at', 'a', 'large', 'canvas', 'by', 'Francisco', 'Goya', "it's", 'the', 'family', 'of', 'Charles', 'the', 'fourth', "there's", 'a', 'direct', 'reference', 'to', 'Velasquez', 'as', 'las', 'meninas', 'we', 'can', 'see', 'the', 'artist', 'actually', 'a', 'self-portrait', 'a', 'bit', 'more', 'in', 'shadow', 'than', 'Velasquez', 'painting', 'himself', 'behind', 'a', 'large', 'canvas', 'pretty', 'much', 'at', 'the', 'same', 'angle', 'as', 'one', 'found', 'in', 'Las', 'Meninas', 'and', 'of', 'course', 'the', 'royal', 'family', 'arrayed', 'before', 'us', 'although', 'in', 'this', 'case', 'the', 'king', 'and', 'queen', 'are', 'here', 'not', 'as', 'a', 'reflection', 'in', 'a', 'mirror', 'but', 'directly', 'before', 'us', 'I', 'think', 'that', 'this', 'strikes']
NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF CASE_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF UNKNOWN_TYPE_DIFF STEM_BASED_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF CASE_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF