I am not a native English guy, and the usage of some words may confuse me. For example, in my last question, I asked about a word "cistern", which located in a house. Although I looked up the dictionary and it said cistern is a kind of water tank, I found it hard to understand why there is a water tank inside a house. It is the cultural difference. For I've never lived in a single house but a skyscraper of 35 floors.
While we ask the meaning of such word, should we add a "culture" tag?