Show the distinct themes of journals.
SELECT DISTINCT Theme FROM journal
SELECT DISTINCT Theme FROM journal
[{'Theme': 'Miami Dolphins'}, {'Theme': 'at Jacksonville Jaguars'}, {'Theme': 'at Baltimore Ravens'}, {'Theme': 'Tampa Bay Buccaneers'}, {'Theme': 'at Detroit Lions'}, {'Theme': 'at Pittsburgh Steelers'}, {'Theme': 'Jacksonville Jaguars'}, {'Theme': 'Baltimore Ravens'}, {'Theme': 'at Cincinnati Bengals'}, {'Theme': 'Pittsburgh Steelers'}, {'Theme': 'at Cleveland Browns'}, {'Theme': 'at Minnesota Vikings'}, {'Theme': 'Green Bay Packers'}, {'Theme': 'at Oakland Raiders'}, {'Theme': 'Cleveland Browns'}, {'Theme': 'Cincinnati Bengals'}]