Natural Language Processing

We have data all around us and there are of two forms of data namely; tabular and text. If you have good statistical tools tabular data has a lot to convey. But it is really hard to get something out of the text, especially the natural language spoken text. So what is natural language? We, humans, have very complex language and natural language is the true form of human language which is spoken/written with sincerity also surpassing grammatical rules.