Assuming the availability of a temporal extraction system and a causal extraction system, the proposed joint framework combines these two using a constrained conditional model (CCM) (Chang et al., 2012) framework, with an integer linear pro-gramming (ILP) objective (Roth and Yih, 2004) that enforces declarative constraints during the inference phase.
these constraints include: (1) A cause must temporally precede its effect.