开源语义解析器：Google的SLING、SyntaxNet
SyntaxNet 全球最精准自然语言解析器
SyntaxNet 是一个框架，即学术圈所指的 SyntacticParser，他是许多 NLU 系统中的关键组件。在这个系统中输入一个句子，他会自动给句子中的每一个单词 打上 POS（part-of-Speech）标签，用来描述这些词的句法功能，并在依存句法树中呈现。这些句法关系直接涉及句子的潜在含义。
SLING - A natural language frame semantics parser
SLING is a parser for annotating text with frame semantic annotations. It is trained on an annotated corpus using Tensorflow and Dragnn.
The parser is a general transition-based frame semantic parser using bi-directional LSTMs for input encoding and a Transition Based Recurrent Unit (TBRU) for output decoding. It is a jointly trained model using only the text tokens as input and the transition system has been designed to output frame graphs directly without any intervening symbolic representation.