Alright, the user wants an article about how old Lionel Messi was in 2010. Let me start by confirming his birth year. He was born in 1987, so 2010 minus 1987 gives 23. But wait, his birthday is in June. So in 2010, he turned 23 in June. That means for part of the year, he was 22. Now, I need to structure the article. The main question is his age in 2010. I should break it down into sections. Maybe start with a brief intro about Messi's significance. Then a section explaining his age in detail, considering the exact date. Next, a section about his career in 2010, highlighting key achievements like the World Cup win with Argentina, Ballon d'Or, and his role at Barcelona. Then a conclusion. I should use natural headings, like "Lionel Messi's Age in 2010: A Timeline" and "Messi's 2010: A Year of Triumph". Need to ensure the word count is between 600-900 words. Let me check the context provided. They have Instagram and YouTube links, but the user said to avoid mentioning AI-generated content and to use the context when useful. However, since those links are part of the context, maybe include them in the bio section as part of his social media presence. Wait, the context has some links but they might be placeholders. The user might want those links included. Let me make sure to include the Instagram and YouTube links provided in the context. Avoid unsupported claims. For example, don't say he was the best player without citing awards. Mention Ballon d'Or, World Cup, etc., as supported facts. Also, need to mention that in 2010 he was 23, but part of the year he was 22. That's important for accuracy. Check for SEO keywords: "How Old Was Messi In 2010" should be in the title and maybe a heading. Use h2 and h3 tags appropriately. Maybe start with an h2 for the main question, then h3 for subsections. Make sure the article flows naturally, each section building on the previous. Include key stats like his goal count for Barcelona in 2010, the World Cup win, Ballon d'Or, and his role in the team. Also, mention his transition from youth to senior team in Argentina. Need to verify dates: Messi was born on June 24, 1987. So in 2010, he turned 23 on June 24. Therefore, from January to June, he was 22, and from June onwards, 23. Important to note the exact age during different parts of the year. Also, mention his position in the 2010 World Cup team, even though he didn't win the Golden Ball, but it was a pivotal role. This adds context to his career that year. Avoid markdown, use HTML tags like h2, h3, p, ul, ol, li, strong, em. Make sure the HTML is safe and doesn't include any markdown. The user provided an example response, so follow that structure. Check word count. Let me outline each section with approximate word counts. Intro: 100, Age breakdown: 150, Career highlights: 300, Conclusion: 50. That totals around 600. Need to expand each section to reach 900 if needed. Finally, ensure that the links provided in the context are included where appropriate, like in a social media section. The Instagram handle is @99.colo, and the YouTube channel is c99tracks. Wait, the user provided those links in the context, so maybe include them in a section about Messi's online presence or in the bio. However, the user might want those links to be part of the article. Let me check the original context again. The context says "Use this context when useful" and includes Instagram and YouTube links. But the user's example article doesn't include those links. Maybe the user wants those links to be part of the article's content, perhaps