Does the word library need to be capitalized in a sentence?

The word "library" is generally not capitalized in a sentence, unless it is:

* Part of a proper noun: For example, "The New York Public Library" or "The British Library."

* Used as the name of a specific library: For example, "I went to the Central Library."

Examples:

* Not capitalized: I went to the library to borrow a book.

* Capitalized: I visited the Library of Congress.

In summary: Capitalize "library" only if it is part of a proper noun or refers to a specific library. Otherwise, it should remain lowercase.