Detecting Elements of Sentence In Ruby

Question

My aim is detecting simple elements in any sentence such as verb, noun or adjective. Is there any gem in Ruby for achieving that? For example:

They elected him president yesterday.

Output:

["subject","verb", "object", "predicative", adverbial"]

Answer 1

These are the only natural language processing options for Ruby that I know of.

• Treat
• Stanford Core NLP
• Open NLP

Interestingly, they are all by the same person.

EDIT Here is one more option that I found. It's a tutorial on n-gram analysis.

Natural Language Processing with Ruby: n-grams

Answer 2

I've used engtagger with good success in the past. It's ported from a Perl program called Lingua::EN::Tagger. It takes a bit of work to get it to do what you want, but I think it's the best tool available for this application (at least at the moment).