English has only one word (to know), whereas Italian has two words that both translate as "to know", i.e. "sapere" and "conoscere". "sapere" is used when you have knowledge of something or the learned ability to do something, e.g. "I know how to swim." (So nuotare.), and "conoscere" is used when you know a person or a place, e.g. "I know Carla" / "I know Rome" (Conosco Carla / Conosco Roma).