将以下文本段落中缺少的单词填入空白处，使之成为一篇完整的文本。


Intellectual property is a category of property that includes _________, _______, and __________. Intellectual property typically refers to intangible property that is the product of human creativity, such as patents, copyrights, trademarks, and trade secrets. Although there is no single legal definition of intellectual property, many of the legal principles governing intellectual property are based on the idea that the products of human creativity are valuable resources that should be protected.
Intellectual property is a category of property that includes inventions, literary and artistic works, and symbols. Intellectual property typically refers to intangible property that is the product of human creativity, such as patents, copyrights, trademarks, and trade secrets. Although there is no single legal definition of intellectual property, many of the legal principles governing intellectual property are based on the idea that the products of human creativity are valuable resources that should be protected.