i think it is the return address
It depends on why you’re wanting to know. For instance, in some languages, knowing pronouns is important because their language gives gender to inanimate objects. In English, people will feel uncomfortable if a person assumes their gender, or get it wrong. This does not include the usage in situations where using a pronoun is a difference between pointing out one person and pointing out someone completely difference.
Their are Five senses so the answer is five.
