Conversation so far:
when did deion sanders play for the atlanta falcons
Deion Sanders played for the Atlanta Falcons from 1989-1993.
who is the head coach of the atlanta falcons?
Dan Quinn is the head coach of the Atlanta Falcons.
has the atlanta falcons won any superbowls?
The Atlanta Falcons have appeared in two Super Bowls and lost both times.

Question: which superbowls did the team appear in?
Self-contained rewrite: which superbowls did the atlanta falcons appear in?