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
に先立って => before; prior to ~ N2
いつかの ... => Previously N4
Time
~の) ならべつだが => if it were ~, it would be different, but... N1
Related, corresponding
べつだんの => particular; special N2
Description
~のが      => Nominalize verbs N5
Nominalization
に気がつく => to notice; to realize N4
~みこみがたつ => have a good prospect N1
Expected
ひとつまちがえば => Just (negligence) N3
Ability
のが好き/のが嫌い => Like (doing something)/Hate (doing something) N4
のが~です => to be N4
~且つ(かつ) => and N1
Line up, list