I doubt you can read them directly, as they are relational structures. You can test it easily enough, though.
You might want to look at the DB Connect add on. You would load the data into a database that can read it, and use Splunk to connect to the db over jdbc using DB Connect. It would use a SQL query to read the log data from the appropriate tables. You should definitely read the docs -there are a number of steps you need for setup, plus you need to load the file into an actual database server and write a query to get out the desired events.