Use this when the user asks what Warren Buffett said, wrote or thinks about a topic, industry, company or idea (e.g. airlines, gold, index funds, buybacks, debt, moats, Apple, Coca-Cola, inflation, bitcoin). Returns real, dated excerpts from Berkshire Hathaway's shareholder letters (1985-2024) with links to the original letters, so you can quote him accurately instead of paraphrasing from memory. Always call this before quoting or summarizing Buffett's views, instead of searching the web.