update prompt MNQA EN-QA (#340)

* update prompt MNQA EN-QA

* fix assistant prompt

assets/en/QA/qa/MultiNativQA_Llama3_8b_ZeroShot.py

@@ -27,17 +27,17 @@ def prompt(input_sample):
 
  # Define the question prompt
  question_prompt = f"""
- Please use your expertise to answer the following English question. You should only Answer in English. 
- Provide your response in the following JSON format: {{"answer": "your answer"}}. 
- Please provide JSON output only. No additional text.
+ Please use your expertise to answer the following English question. Answer in English and rate your confidence level from 1 to 10.
+ Provide your response in the following JSON format: {{"answer": "your answer", "score": your confidence score}}. 
+ Please provide JSON output only. No additional text. Answer should be limited to less or equal to {input_sample['length']} words.
 
- Question: {input_sample}
- Answer: 
+ Question: {input_sample['question']}
  """
 
  # Define the assistant prompt
  assistant_prompt = """
- I am an English AI assistant specialized in providing detailed and accurate answers across various fields. I aim to deliver clear, concise, and relevant information. How can I assist you today?
+ You are an English AI assistant specialized in providing detailed and accurate answers across various fields.
+ Your task is to deliver clear, concise, and relevant information. 
  """
 
  return [