fix index shift

app.py

@@ -51,7 +51,7 @@ def create_input_to_t5(question, answer):
     input_line = [question]
     answer_paragraph = get_ans_sentence_with_stanza(answer, en_nlp)
     for idx, answer_sent in enumerate(answer_paragraph):
-        sep_token = '[{}]'.format(idx)
+        sep_token = '[{}]'.format(idx+1) # shift by one
         input_line.append(sep_token)
         input_line.append(answer_sent)
     return ' '.join(input_line)