ThisisabookaboutNaturalLanguageProcessing.By“naturallanguage”wemeanalanguagethatisusedforeverydaycommunicationbyhumans;languagessuchasEnglish,Hindi,orPortuguese.Incontrasttoartificiallanguagessuchasprogramminglanguagesandmathematicalnotations,naturallanguageshaveevolvedastheypassfrom