Stanford NLP Tokens Regex无法识别NER及入门教程需求求助

Hey there! Let's work through your Tokens Regex problem step by step.

First, Understand the NER Dependency #

Tokens Regex doesn’t come with its own NER model—it relies entirely on Stanford CoreNLP’s NER component to recognize tags like {ner:PERSON} and {ner:DATE}. So the first thing to check is whether your setup properly integrates CoreNLP’s NER module, and that you’re running NER annotation on your text before applying Tokens Regex.

Adjust Your Matching Pattern #

Your goal is to extract a person and their birth date, so let’s tweak your pattern to handle multi-token entities (since names like "John Smith" and dates like "March 1, 1999" span multiple tokens):

(([{ner:PERSON}]+) /was/ /born/ /on/ ([{ner:DATE}]+))

Key changes:

• Added + after [{ner:PERSON}] to match consecutive tokens tagged as PERSON (since "John" and "Smith" are both PERSON tokens)
• Added + after [{ner:DATE}] to capture the full multi-token date entity

Beginner-Friendly Resources (No External Links) #

You don’t need to hunt far for good intro material! The Stanford CoreNLP installation package includes a tokensregex.md file with beginner-friendly examples, from basic syntax to combining Tokens Regex with NER. You’ll also find code snippets in CoreNLP’s Java API examples that show exactly how to chain NER annotation with Tokens Regex—perfect for getting started.

Quick Troubleshooting Steps #

1. Validate NER First: Use CoreNLP’s NER tool alone on your sentence "John Smith was born on March 1, 1999" to confirm that "John Smith" is tagged as PERSON and "March 1, 1999" is tagged as DATE. If this step fails, your NER setup is the issue.
2. Chain Annotators Correctly: Make sure your code runs the NER annotator before the TokensRegex annotator. CoreNLP processes annotators in order, so Tokens Regex needs the NER tags already present to match against.
3. Check Version Compatibility: Ensure you’re using a recent, stable version of CoreNLP—older versions might have bugs or compatibility gaps between NER and Tokens Regex.

内容的提问来源于stack exchange，提问作者El Hefty Jefe