家里亲戚申请了投资移民,递交了I-526,但是至今没有移民局的回音。现在他想来美国探亲,想申请探亲旅游签证。现在在填签证表格的时候该如何回答这个问题:Has anyone ever filed an immigrant petition on your behalf with the United States Citizenship and Immigration Services? 填Yes or No?他是投资移民的主申请人。请朋友们帮忙解答,谢谢!!!