Here is a complicated description of a complex sentence: "A sentence composed of at least one main clause and one subordinate clause". I don't really understand this so please rewrite this description to use common, understandable language and give me example of a complex sentence.
A compound sentence (also known as complex or composite sentence) consists of two or more sentences connected by a conjunction (e.g., and, nor, for, etc.) or other connecting words.

For instance, the following sentence contains two separate clauses that are linked together with a conjunction ("for"):

The man rode his bicycle for an hour.
(The man bicycled for an hour.)

Compound sentences can be used in different contexts to express ideas more clearly than simple sentences. For example, they may be used when making a comparison between multiple items, summarizing a sequence of events, explaining a process, or describing a person's character. Additionally, compounds can help make sentences clearer by dividing them into smaller components which can be understood more easily on their own.

Complex sentences are not necessarily difficult to comprehend. However, it can be helpful to have some prior knowledge about grammar and syntax in order to fully understand them. When reading complex sentences, it is often helpful to break down the individual parts and try to figure out how they fit together. By doing this, you will better appreciate the meaning behind the text and become able to analyze its structure and context more accurately.