update readme

README.md

@@ -11,7 +11,7 @@ It aims to cover both traditional and core NLP tasks such as dependency parsing
 * ![](resources/preprocess_1.png) [Sentence Boundary Disambiguation](tasks/sentence_boundary_disambiguation.md) / [Language Detection](tasks/language_detection.md) / [Spelling Correction](tasks/spelling_correction.md)
 * ![](resources/tagging.png) [Word Segmentation](tasks/word_segmentation.md) / [Part-of-Speech Tagging](tasks/part_of_speech_tagging.md) / [Chunking](tasks/chunking.md) / [Parsing](tasks/parsing.md)
 * ![](resources/classification.png) [Text Classification](tasks/text_classification.md) / [Sentiment Analysis](tasks/sentiment_analysis.md) / [Representation](tasks/representation.md)
-* ![](resources/ner.png) [Named Entity Recognition](tasks/named_entity_recognition.md) / [Relationship Extraction](tasks/relationship_extraction.md) / Event Extraction
+* ![](resources/ner.png) [Named Entity Recognition](tasks/named_entity_recognition.md) / [Relationship Extraction](tasks/relationship_extraction.md) / [Event Extraction](tasks/event_extraction.md)
 * ![](resources/entity_linking.png) Coreference Resolution / Slot Filling / Entity Linking
 * ![](resources/semantic.png) Semantics / [Semantic Role Labeling](tasks/semantic_role_labeling.md)
 * ![](resources/book.png) Knowledge Representation and Reasoning