These leaders are living proof that prevention works and that we can manage the health problems that come with age.本句话的主语是1______，谓语是2_______，表语是3_________；proof后面有三个that从句：第一个that引导的是4_____（主语？宾语？表语？同位语？定语？）从句，解释说明proof的内容，从句主语是5_____，谓语是6______；第二个that引导的是7______（主语？宾语？表语？同位语？定语？）从句，从句主语是8____，谓语是9______，宾语是10______；第三个that引导的是11_____（主语？宾语？表语？同位语？定语？）从句，that在从句中做从句的12_______（主语？宾语？定语？表语？）
