You can find patterns in data, associate them with the parameters, and use them to generate output.

Fakhra Jabeen thanks for your answer. I am looking for example or a github project from where I can have clear idea how cognitive science can be used for NLP. I am new to this field, so I am looking for some beginner's guide which helps me to write my own program. Thanks again for your reply.

It particularly depend upon your requirements but you can use different classifiers along with data analytical tools to achieve your goal. Or may be you can use IBM Watson too.

Please suggest any particular data set and solution code(github). I am learning it and looking for a beginners' guide. I don't have any particular problem statement right now.