Information Extraction from Text

Survey of Stages of Developing the Information Extraction Systems from the Web

“…When this pattern matches a sequence of tokens the specified action is fired. An action can label a sequence of tokens like an entity by inserting the start or end of entity label or identifying multiple entities simultaneously (10) . On the other hand, statistical methods are based on a weighted sum of predicate firings and robust to noise in the unstructured data.…”

“…It is used in question answering. For example, candidate answer strings are often named entities that is needed to be extracted and classified first (10), (11).…”

“…Information Extraction is an important task in text mining and has been extensively studied in various research communities including natural language processing, information retrieval and web mining. It has a wide range of applications in domains such as biomedical literature mining and business intelligence (10) . Extracting rules to be filled in a formatted data tables is considered as an application of IE.…”

“…Furthermore, the text-like extractions can be integrated into such applications relatively easily (22) . There are some other examples on the application where the information extraction can be applied such as, biomedical research, financial professionals, and intelligent analysis (10) .…”

“…These are a special group of methods based on the fact that most web pages are generated by templates. Each method has its advantages and drawbacks, and a specific domain which is good at (10), (9) . Search engines is the common example for an information extraction process which used by the user.…”