I recommend to look at a new research tools Answer Analyst.
You will find a fine video that will enables you to understand the main features of the tool.
The tool’s price is $77.
An info about tool is rather short and I did not find answers to such questions:
1. What approach or technology do they use when processing your query – natural language question?
2. What search engine do they use?
But in any case it is an interesting tool and you should spend about 10 minutes to watch their video.
Posted by zigmasb 