に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
[後「あと」]で => After V1, V2 N5
Time
たが[最後「さいご」] => Once A occurs, B happens N1
Information, Report