に先立って => before; prior to ~ N2
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
... 反対に => on the contrary N3
Compare
に対して => towards; against; regarding; in contrast with ~​ N3
のに対して => towards; against; regarding; in contrast with ~ N2
ような感じがする => have a feeling that; feels like; seems like; think that ~ N3
Description
…と (は) はんたい (反対)に => opposition; resistance; antagonism; objection; dissent N3
Compare
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N3
Reason, Result, Response
に[対「たい」]して/に[対「たい」]しては => In response to (topic) A, in regards to A, considering A, in contrast to A N2
Reason, Result, Response