WASHINGTON (AP) — Two days after the Federal Reserve revealed an intensifying internal debate over interest rates, Chair Janet Yellen will address the annual Fed conference in Jackson Hole, Wyoming, with investors seeking any clear hints of when it will start raising rates.

The subject of Yellen’s remarks Friday will be labor markets, which is the theme of this year’s gathering of central bankers. Minutes of the Fed’s July 29-30 meeting released Wednesday showed that officials engaged in a sharp debate over whether to raise rates sooner than expected if the economy keeps strengthening.