I found the sticker.
Reads: "EAT GARLIC LIVE LOVE LAST LONGER" – "JIMMY SEAS MARTHA'S VINEYARD"
See pic related.
Note: Found via GOOG IMGS, links to pinterest post, but the image must be buried deep in the posts.
Possible related info:
https:// vineyardgazette.com/news/2016/08/18/presidential-vacation-winds-down
https:// sg.news.yahoo.com/sasha-obama-scores-summer-job-151640933.html