This is to say a well-formed dependency substructure headed by a verb is usually semantic integrity.
we define two types of BEDU as follows: The first type is hard-BEDU, a source-side span and a target-side span compose a hard-BEDU if and only if the source and target span are translations with each other, are both well-formed dependency substructures (dominated by a verb1) and the source or the target span should be an EDU in the monolingual language.