Can you import data into Bento? From what file formats?
Data can be exported from FileMaker into a number of common file formats. If Bento can import from one of these file formats, then you export the data into such a file and then import into Bento.
Note, however, that the structure of the data in your file may not lend itself to successful import in to Bento as I believe it uses a much simpler table structure than can be produced in the design of a FileMaker database.