claim: Dark matter is hypothetical.
evidence: Berra is a comune -LRB- municipality -RRB- in the Province of Ferrara , Emilia-Romagna , Italy .. Berra. Berra. Berra may also refer to  :. Berra. Berra. Berra -LRB- surname -RRB-. Berra. Berra. La Berra , a mountains of the Alps. Berra. Berra. La Berra. La Berra