Then with (1, 2)=before and (2, 3)=vague, we can see that (1, 3) cannot be uniquely determined, but it is restricted to be selected from {bef ore, vague} rather than the entire label set.
3 Joint Learning on F and P In this work, we study two learning paradigms that make use of both F and P. In the first, we simply treat those edges that are annotated in P as edges in F so that the learning process can be performed on top of the union of F and P. This is the most straightforward approach to using F and P jointly and it is interesting to see if it already helps.