The decision-making process of people is affected by the opinions formed by thought leaders and ordinary people. When a person wants to buy a product online he or she will typically start by searching for reviews and opinions written by other people on the various offerings. Sentiment analysis is one of the hottest research areas in computer science. The heating and air conditioning functioned well; this was good as the weather was variable. The king size bed was very comfortable. The building and rooms are very well soundproofed. The neighborhood is the best for shopping, restaurants, and access to subway. The documents in this corpus are converted to text and are pre-processed using a variety of linguistic tools such as stemming, tokenization, part of speech tagging, entity extraction, and relation extraction. The system may also utilize a set of lexicons and linguistic resources. The main component of the system is the document analysis module, which utilizes the linguistic resources to annotate the pre-processed documents with sentiment annotations.