Natural Language Processing for Disaster Management Using Conditional Random Fields

This research aims to extract name entity mentioned in unstructured text into a predefined category using Conditional Random Field (CRF) and bidirectional Long Short-Term Memory (LSTM). The experiments were conducted using one thousand words which extracted from the collection of twitter massage that collected in the topic related to natural disaster and classify into six classes of the output. There are three scenarios for testing and evaluate: CRF, CRF-optimize and a combination of LSTM and CRF. The results show that CRF-optimize parameter performance is given better than other model with 98.94%, 98.95% and 98.93% for precision, recall and F-measure respectively.