Update README

README.md

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 license: apache-2.0
+language:
+- en
+tags:
+- Summarization
+- Text Generation
+- Text2Text Generation
+- Conversational
+widget:
+- text: "Summarize: You may want to stick it to your boss and leave your job, but don't do it if these are your reasons."
+  example_title: "Summarization"
+- text: "Given the dialog: do you like dance? [SEP] Yes I do. Did you know Bruce Lee was a cha cha dancer?"
+  example_title: "Dialog"
+- text: "Describe the following data: Iron Man | instance of | Superhero [SEP] Stan Lee | creator | Iron Man"
+  example_title: "Data-to-text"
+- text: "Given the story title: I think all public schools should have a uniform dress code."
+  example_title: "Story Generation"
+- text: "Answer the following question: From which country did Angola achieve independence in 1975?"
+  example_title: "Question Answering"
+- text: "Generate the question based on the answer: boxing [X_SEP] A bolo punch is a punch used in martial arts . A hook is a punch in boxing ."
+  example_title: "Question Generaion"
 ---