亲爱的CHARLS团队，
您们好！
我想咨询一下问卷中关于父母死亡原因的数据。
在问卷中，有题目为“您亲生父亲/母亲去世的主要原因是什么？____”，但是在data里没有找到相关的发布数据。
请问能否获取父母死亡原因的相关数据？若此数据是不对外公开的限制数据，是否可以申请权限或者购买权限？
此题目对我的研究非常重要，也是填补国内外research gap很重要的数据，希望能够有机会获取这个数据。感谢您百忙之中的回答！
具体的题目和题号如下：
CHARLS 生命历程 2014
A3a 您亲生母亲去世的主要原因是什么？____
A3b 您亲生父亲去世的主要原因是什么？____
CHARLS 2015
CA000_W3_4 您亲生父亲去世的主要原因是什么？____
CA001_W3_4 您亲生母亲去世的主要原因是什么？____
CHARLS 2018
CA000_W3_4 您亲生父亲去世的主要原因是什么？____
CA001_W3_4 您亲生母亲去世的主要原因是什么？____
Dear CHARLS Team,
I’m writing to ask the data about parental death cause in the CHARLS dataset.
In the questionnaires of CHARLS 2015, CHARLS 2018 and CHARLS Life History 2014, there're questions about parental death reason "what was the main cause of your biological mother's /father's death?", but there're no such data in the dataset. I'd like to ask whether I could get access to the following parental death cause data.
The specific questions in each year are:
CHARLS Life History 2014
A3a What was the main cause of your biological mother's death?
A3b What was the main cause of your biological father's death?
CHARLS 2015
CA000_W3_4 What was the main cause of your biological father's death?
CA001_W3_4 What was the main cause of your biological mother's death?
CHARLS 2018
CA000_W3_4 What was the main cause of your biological father's death?
CA001_W3_4 What was the main cause of your biological mother's death?
Thank you in advance and looking forward to your reply!