What concepts are described in the following sentence?

"Preceded by The Grantville Gazettes, 1634: The Bavarian Crisis (by Virginia DeMarce and Eric Flint) is the sequel to Grantville Gazette III."

Return the answer as pairs of triples.
1634: The Bavarian Crisis PRECEDED_BY Grantville Gazette III
1634: The Bavarian Crisis AUTHOR "Virginia DeMarce and Eric Flint"
1634: The Bavarian Crisis PRECEDED_BY The Grantville Gazettes