Conversation so far:
what is the The Aquabats's 20th anniversary
On March 17, 2014, in celebration of their 20th anniversary as a band, The Aquabats announced the first leg of their 20th Anniversary Tour for May.
where did the The Aquabats' 20th anniversary tour start
Philadelphia, PA
What states did The Aquabats' 20th anniversary tour go to
The Aquabats announced their 20th Anniversary Tour for May, covering fifteen shows in nine states on the East Coast.
what happened to the Aquabats in 2014
On March 17, 2014, in celebration of their 20th anniversary as a band, The Aquabats announced the first leg of their 20th Anniversary Tour for May.
What did The Aquabats do after the 20th anniversary tour
Following another stretch of relative inactivity for most of 2015 and 2016, The Aquabats announced a 13-date tour of the American Midwest and East Coast in May 2017.

Question: why were they inactive
Self-contained rewrite: why were The Aquabats inactive after the 20th anniversary tour