Complex sentence: Also recorded during the sessions was "4/20/02," a song honoring Alice in Chains frontman Layne Staley which Vedder wrote the same day that he heard the news of Staley's death.
Split into simpler sentences: Also recorded during the sessions was "4/20/02," a song honoring Alice in Chains frontman Layne Staley. It was written by Vedder the day that he heard the news of Staley's death.