Sentence:  From the point of view of syntactic <WSD>analysis</WSD> the head word in the statement is the predicator has broken , and from the point of view of meaning it would seem that the trouble centers in the breaking ; but dominant stress will be assigned to broken only in rather exceptional versions of the sentence . 
Meaning of the word marked with <WSD> tags:  the abstract separation of a whole into its constituent parts in order to study the parts and their relations