The phrase "which hospital" in Engpsh is "那家医院" in Chinese.
The origin of the phrase is based on the use of the word "which" in Engpsh, which is used to ask about the specific identity of something being referred to. In this case, the phrase is asking which hospital is being referred to.
Examples of usage in Engpsh:
Can you tell me which hospital you visited yesterday?
I need to know which hospital my friend was taken to after the accident.
Translations:
你能告诉我昨天你去了哪家医院吗？
我需要知道我朋友在事故后被带到了哪家医院。