Example of event annotation. GENIA event annotation is made sentence by sentence. Although the actual corpus file with annotation is encoded in XML (C), the annotators work on a CSS-styled view (A) which is much more user-friendly. Sometimes, a graphical representation (B) is used to depict annotated events and their relations in an abstract and concise way. Note that the black, red and blue arcs link an event with its themes, causes and location respectively.