SyntaxNet is the overall framework for parsing sentences, called a “syntactic parser.” Parsey McParseface is the English language plug-in for SyntaxNet. Google claims that it can correctly identify the subjects, objects, verbs, and other grammatical building blocks of sentences as well (or, in some cases, better) as trained human linguists — achieving 94 percent accuracy on English-language news articles.

Source: Google is giving away the tool it uses to understand language, Parsey McParseface | The Verge