Books on Amazon
One proposal boils down to intepret the rest of the sentence, following the "believes" as a complex adverb.
DavidsonVs: no one has any idea how it the meanings of each word could be derived. We understand the sentences obviously, because we understand the contained words.
If the "content" of the propositional attitudes were the meanings, novel and long words would have to be learned - words which often occur only once. But since every declarative sentence can occur as a content sentence, their number is infinite and therefore not learnable.
Der Mythos des Subjektiven Stuttgart 1993
Handlung und Ereignis Frankfurt 1990
Wahrheit und Interpretation Frankfurt 1990