在签证表上有这样一个问题：
Have you ever been unlawfully present, overstayed the amount of time granted by an immigration official or otherwise violated the terms of a U.S. visa?
我父母2001年八月来美国探亲，半年后申请延期。但收到deny的信。我们又开始appeal。直到2002 年九月20日， 我们才收到了移民局的来信，信上是这样写的：
On June 15, 2002, you filed a Motion to reconsider the denial or revocation of your Application to Extend/Change Nonimmigrant Status (Form I-539) rendered on November 27, 2002.
The motion as submitted has been reviewed. It meets the requirements of 8CFR 103.5 concerning the proper filing of a motion. Accordingly, the request to reconsider these proceeding will be and hereby granted.
这段话是说我父母的身份合法到2002年十一月份吗？而且2002年七月， 我父母已经回国了。请问我应该回答YES还是NO?