In the Chinese sentence, MaxEnt b classifies "讨 论(tao3lun4)" as "Future" because there is no grammatical indicator in the Chinese sentence implying that the "discussion" has already happened and it is reasonable to assume the "discussion" is in the near future.
with eventuality type "Episodic" and modality label "Actual", MaxEnt em classifies it as "Past" correctly, because episodic events tend to occur in the past and future events tend to get "Intended" or "Hypothetical" modality labels.