the hero whose left leg he lost in the war is well looked after中为什么关系代词修饰宾语

whose 定语从句中做定语，可以修饰定语从句中的宾语也可以修饰从句中的主语，就像你的例句一样。懂了吗？ 又比如：
The house whose windows are open is mine.修饰主语。
the boss whose factory my father works in is kind. 做介词in 的宾语。