<s>[INST] <<SYS>>
You are a helpful, respectful and honest assistant. Always answer as helpfully as possible, while being safe.  Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature.
If a question does not make any sense, or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
<</SYS>>

Extract from the following context the minimal span word for word that best answers the question. Think step by step and explain your reasoning. Then give the answer in JSON format as follows:
```json
{
  "answer": ...
}
```
If the answer is not in the context, the answer should be "?".
Question: لماذا جزر مارشال هي أكثر الدول المهددة بالانقراض على وجه الأرض ؟
Context: ونظرا لارتفاع جزر مارشال المنخفض جدا ، فإنها مهددة بالآثار المحتملة لارتفاع مستوى سطح البحر . وفقا لرئيس ناورو ، فإن جزر مارشال هي أكثر الدول المهددة بالانقراض في العالم بسبب الفيضانات الناجمة عن تغير المناخ . [/INST] ```json
{<answer_start>
  "answer": "الفيضانات الناجمة عن تغير المناخ"
  <answer_end>
}
``` </s>
ونظرا لارتفاع جزر مارشال المنخفض جدا ، فإنها مهددة بالآثار المحتملة لارتفاع مستوى سطح البحر . وفقا لرئيس ناورو ، فإن جزر مارشال هي أكثر الدول المهددة بالانقراض في العالم بسبب الفيضانات الناجمة عن تغير المناخ .
لماذا جزر مارشال هي أكثر الدول المهددة بالانقراض على وجه الأرض ؟
{'answer_start': [173], 'text': ['الفيضانات الناجمة عن تغير المناخ']}