What is included in the first four lines of a research paper?

1. Title of the paper. This should be descriptive and concise, and it should indicate the main topic of the paper.

2. Author(s) names. The full names of all authors should be listed, and their affiliations should be indicated.

3. Abstract. This is a brief summary of the paper, usually no more than 500 words. It should provide the reader with a concise overview of the paper's main points and findings.

4. Keywords. These are a few key words or phrases that describe the main topics of the paper. They are used to help readers find the paper when searching for relevant information.