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)].

['now', "I'd", 'like', 'to', 'introduce', 'our', 'speaker', 'for', 'today', 'Melissa', 'Valentine', 'is', 'an', 'assistant', 'professor', 'at', 'Stanford', 'University', 'in', 'the', 'management', 'science', 'and', 'engineering', 'department', 'and', 'co-director', 'of', 'the', 'Center', 'for', 'work', 'technology', 'and', 'organization', 'her', 'award-winning', 'research', 'focuses', 'on', 'designing', 'groups', 'and', 'organizations', 'how', 'the', 'rise', 'of', 'information', 'technology', 'has', 'impacted', 'organizational', 'behavior', 'and', 'how', 'new', 'technology', 'can', 'improve', 'organizational', 'structures', 'and', 'outcomes', 'professor', "Valentine's", 'work', 'makes', 'contributions', 'to', 'understanding', 'classic', 'and', 'long-standing', 'challenges', 'in', 'designing', 'groups', 'and', 'organizations', 'deep', 'knowledge', 'of', 'how', 'to', 'rise', 'of', 'how', 'the', 'rise', 'of', 'information', 'technology', 'has', 'made', '', 'the', 'possible', 'new', 'and']
CASE_AND_PUNCUATION_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 CASE_DIFF CASE_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF CASE_DIFF CASE_DIFF NO_DIFF CASE_DIFF CASE_DIFF NO_DIFF CASE_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF CASE_AND_PUNCUATION_DIFF CASE_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 PUNCUATION_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 INTRAWORD_PUNC_DIFF NO_DIFF NO_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF PUNCUATION_DIFF NO_DIFF NO_DIFF NO_DIFF NO_DIFF UNKNOWN_TYPE_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