update prompt

tasks/knwl_dialo/prompt.py

@@ -104,7 +104,7 @@ def generate_samples_by_prompting_input_from_file(model):
                 if args.prompt_type == "knowledge":
                     turns = splits[1].split(" [SEP] ")
                     context = turns[-1]
-                    if " -> " in raw_text:
+                    if " -> " in raw_text and " => " not in raw_text:
                         raw_text += "( " + context + " ) " + topic + " ->"
                     else:
                         raw_text += "( " + context + " ) " + topic + " =>"