Dependency Annotation of Coordination for Learner Language

We present a strategy for dependency annotation of corpora of second language learners, dividing the annotation into different layers and separating linguistic constraints from realizations. Specifically, subcategorization information is required to compare to the annotation of realized dependencies. Building from this, we outline dependency annotation for coordinate structures, detailing a number of constructions such as right node raising and the coordination of unlikes. We conclude that branching structures are preferable to treating the conjunct as the head, as this avoids duplicating annotation.