On the Stag's Leap Wine Cellars website, find out who founded the winery and the year of their first vintage. Provide both the founder's full name and the specific year of the first vintage as stated on the 'Our Story' page.
Navigate to stagsleapwinecellars.com. Pass the age verification gate by confirming you are 21 or older. Hover over the 'Estate' link in the main navigation. Click on the 'Our Story' sub-link. Scroll down the 'Our Story' page to locate the founder's name and the year of the first vintage. State the founder's full name and the year of the first vintage.
Successfully identify the full name of the founder as 'Warren Winiarski'. Successfully identify the year the first vintage was produced as '1973'. State both pieces of information clearly in the final answer.