Pos tag threshold

created a class for checking the precision, recall and f1-scores by predicting errors in sentences.

data/corpus_POS_n=1.json

+{"TO": {"TO": 473369}, "VB": {"VB": 648041}, "DT": {"DT": 3074013}, "JJR": {"JJR": 68807}, "NN": {"NN": 4094732}, "IN": {"IN": 3328924}, "PRP": {"PRP": 423778}, "VBP": {"VBP": 520568}, "NNP": {"NNP": 865041}, "CC": {"CC": 711476}, "NNS": {"NNS": 1433890}, "JJ": {"JJ": 2288679}, "MATH": {"MATH": 1278037}, ",": {",": 1349627}, "MATHDISP": {"MATHDISP": 188349}, "WRB": {"WRB": 120758}, "CD": {"CD": 379731}, "RB": {"RB": 842861}, ".": {".": 1176329}, "VBZ": {"VBZ": 895876}, "MD": {"MD": 233961}, "VBG": {"VBG": 382263}, "REF": {"REF": 226499}, "VBN": {"VBN": 732389}, ":": {":": 129205}, "(": {"(": 336356}, ")": {")": 337872}, "RBR": {"RBR": 29970}, "WDT": {"WDT": 149617}, "JJS": {"JJS": 34222}, "VBD": {"VBD": 176140}, "EX": {"EX": 40107}, "CITE": {"CITE": 152054}, "WP": {"WP": 8880}, "``": {"``": 20466}, "''": {"''": 21342}, "NNPS": {"NNPS": 2245}, "POS": {"POS": 29793}, "PRP$": {"PRP$": 93378}, "FW": {"FW": 15290}, "RP": {"RP": 16874}, "PDT": {"PDT": 14990}, "RBS": {"RBS": 7680}, "WP$": {"WP$": 5088}, "LS": {"LS": 114}, "$": {"$": 2387}, "UH": {"UH": 669}, "SYM": {"SYM": 151}, "#": {"#": 343}}
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