Hyooronka-wa [ kyonen goosutoraitaa-ga (sono) shoosetsu-o kai-ta toyuu hoodoo-o] shinjitei-ru .
commentator-TOP  last.year ghost.writer-NOM (the) novel-ACC write-PST that.say news-ACC believe-NPST
The commentator believes the news that the ghost-writer wrote (the) novel last year.