Ambiguous temporal markers such as after, as or while usually occur with a purely temporal reading, but also with additional non-temporal discourse relations, such as causal and contrastive readings.
the best feature set achieves F-measures of 0.41 (contrast), 0.39 (parallel) and 0.33 (evidence) on these relations, with precision values between 0.33 (evidence) and 0.36 (contrast), and recall values between 0.33 (evidence) and 0.47 (contrast).